Most Protestant denominations will permit divorce for certain reasons, such as adultery.
The Catholic Church will not recognize divorce, even if one spouse committed adultery. Not all divorced Catholic couples are granted an annulment. Without an annulment, the couple will always be considered married, as far as the Church is concerned. A divorced Catholic (without an annulment) cannot marry again in the Catholic Church.
Evangelical Protestants are the most politically conservative Christian tradition. Within each tradition, those with literal views of the Bible are more politically conservative than is their tradition overall. Catholics that are Biblical literalists (11.8%) hold more conservative political views than the Catholic population in general does. The Biblical literalist Catholic is as politically conservative as the Biblical literalist who is Evangelical (47.8%) or Mainline Protestant. (11.2%) American Piety in the 21st Century, Baylor Institute for Studies of Religion http://www.baylor.edu/content/services/document.php/33304.pdf
"Most Protestant denominations will permit divorce for certain reasons, such as adultery. "
I think that at best that (Matthew 19:9) and perhaps abandonment, (1 Corinthians 7:15) may allow for divorce and thus remarriage, but the problem is that many think that forgiveness of illicit divorce sanctions marriage to another while the actual spouse remains alive.
"The Catholic Church will not recognize divorce, even if one spouse committed adultery. Not all divorced Catholic couples are granted an annulment. Without an annulment, the couple will always be considered married, as far as the Church is concerned. A divorced Catholic (without an annulment) cannot marry again in the Catholic Church."
Considering the multiple conditions*, many enabling subjective judgment, under which Rome can declare a marriage never existed, and in the light of what she has annulled, then it potentially means multitudes of Catholics are not validly married, even though Rome does not consider them so until she says they are.
*
marriage that excluded at the time of the wedding the right to children, or to a permanent marriage, or to an exclusive commitment.
In addition, there are youthful marriages;
marriages of very short duration;
marriages marked by serious emotional, physical, or substance abuse;
deviant sexual practices;
profound and consistent irresponsibility and lack of commitment;
conditional consent to a marriage;
fraud or deceit to elicit spousal consent;
serious mental illness; or a previous bond of marriage.
- www.arlingtondiocese.org/tribunal/faq.php#Grounds
Can. 1095 The following are incapable of contracting marriage:
1/ those who lack the sufficient use of reason;
2/ those who suffer from a grave defect of discretion of judgment concerning the essential matrimonial rights and duties mutually to be handed over and accepted;
3/ those who are not able to assume the essential obligations of marriage for causes of a psychic nature [all are judgment calls which can see varying verdicts].
List of diriment impediments to marriage
Age.[6] If the man is under 16 years of age, or the woman is under 14 years of age, then their marriage is invalid. This is an ecclesiastical impediment, and so does not apply to a marriage between two non-Catholics. However, note that in a marriage between a Catholic and a non-Catholic, the age limitation applies to the non-Catholic party as well.[7]
Physical capacity for consummation lacking [15]. Per Canon 1084 §3 "Without prejudice to the provisions of Canon 1098, sterility neither forbids nor invalidates a marriage." Both parties, however, must be physically capable of completed vaginal intercourse, wherein the man ejaculates "true semen" into the woman's vagina. (See [1] for details.)
To invalidate a marriage, the impotence must be perpetual (i.e., incurable) and antecedent to the marriage. The impotence can either be absolute or relative. This impediment is generally considered to derive from divine natural law, and so cannot be dispensed.[16] The reason behind this impediment is explained in the Summa Theologica:[17]
“In marriage there is a contract whereby one is bound to pay the other the marital debt: wherefore just as in other contracts, the bond is unfitting if a person bind himself to what he cannot give or do, so the marriage contract is unfitting, if it be made by one who cannot pay the marital debt.”
Previous marriage [18]. Previous marriages, whether conducted in the Catholic Church, in another church, or by the State. All previous attempts at marriage by both parties wishing to marry must be declared null prior to a wedding in the Catholic Church, without regard to the religion of the party previously married. Divine, absolute, temporary.
Disparity of cult [19]. A marriage between a Catholic and a non-baptized person is invalid, unless this impediment is dispensed by the local ordinary. Ecclesiastical, relative.
Sacred orders [20]. One of the parties has received sacred orders. Ecclesiastical, absolute, permanent (unless dispensed by the Apostolic See).
Perpetual vow of chastity [21]. One of the parties has made a public perpetual vow of chastity. Ecclesiastical, absolute, permanent (unless dispensed by the Apostolic See).
Abduction [22]. One of the parties, usually the woman, has been abducted with the view of contracting marriage.
Ecclesiastical,[citation needed] temporary.
Crimen [23]. One or both of the parties has brought about the death of a spouse with the view of entering marriage with each other. Ecclesiastical, relative, permanent (unless dispensed by the Apostolic See).
Consanguinity [24]. The parties are closely related by blood.
Ecclesiastical or divine, depending on the degree of relationship. Relative, permanent.
Affinity [25]. The parties are related by marriage in a prohibited degree. Ecclesiastical, relative, permanent.
Public propriety [26]. The parties are "related" by notorious concubinage. Ecclesiastical, relative, permanent.
Adoption [27]. The parties are related by adoption. Ecclesiastical, relative, permanent.
Spiritual relationship [28]. One of the parties is the godparent of the other. This no longer applies in the Latin Rite, but still applies in the Eastern Catholic Churches.
http://en.wikipedia.org/wiki/Canonical_impediment#List_of_diriment_impediments_to_marriage
And then there is Petrine/Pauline Privilege referred to here, plus past RC teaching which required married priests to put away their wives, in stark contrast to Scripture in which the normative marital state of the apostles and pastors was that of being married. (1Co. 9:5; 1Tim. 3:1-7)
Rome also considers entering marriage with the intention of never having children to be a "grave wrong and more than likely grounds for an annulment."[McLachlan, P. "Sacrament of Holy Matrimony." http://www.catholicdoors.com/faq/qu164.htm], while praying to a women who they claim went thru with a marriage intending to do just that.
Thus while on one hand Catholics (erroneously) claim that the historical teaching of their church has rejected any provision for the lawful dissolution of marriage, on the other hand she simply can say there was no marriage in the first place, based upon rules that are so subjective that it is reported (https://www.traditioninaction.org/religious/k021-Indissolubility.html) that a bishop said, "There is not one marriage in America that we can't annul."
A SSPV (which has their own problems) site concludes,
68% of annulments today [dated] are granted because of "defective consent," which involves at least one of the parties not having sufficient knowledge or maturity to know what was involved in marriage. The ingenuity of judges in confidently asserting that such knowledge or maturity was lacking is amazing. Vasoli says that it is done by substituting "junk psychology" for sound psychology and psychiatry. (www.mostholyfamilymonastery.com/28_Annulments.pdf)
Just WHERE did they get such a crazy idea??!!??
Just WHERE did they get such a crazy idea??!!??