What's unequal? They have exactly the same rights as everyone else... marriage to someone of the opposite sex.
Truth is they want to legally validate their perverse lifestyle choice. This issue isn't about "Consenting adults" or "bedroom privacy" or "individual or civil rights" like the advocates of homosexual marriage dishonestly and vehemently insist.
"Gay Marriage" is the "Trojan horse" method of attack by homosexual activists and advocacy groups in the effort to legitimize the perverse behavior of homosexuality in the courts and by legislation. Should homosexual marriage be legalized then by judicial fiat homosexuality would be legitimized across the board. This means that school children by law would be taught that homosexual behavior is a "safe" and "normal" alternative "sexual lifestyle" choice and by law parents will have no grounds to object (regardless of the negative spiritual, moral, psychological, biological, and medical consequences) IOW unconditional approval and acceptance, kowtow or else.
More true than you realize, especially the literary allusion to the Trojan Horse and ancient Greece...
Plato’s Euthyphro is a great illustration. Socrates advances the argument to Euthyphro that, piety to the gods, who all want conflicting devotions and/or actions from humans, is impossible. Socrates exposed the pagan esoteric sophistry.
Morality and all of its associated concepts are from the belief that some higher power is defining the correctness of human behavior. Today, "morals" are a religious pagan philosophy of esoteric hobgoblins where transfiguration is from pantheons of fantasies as the medium of infinitization. Others get derision for having an unwavering Judaic belief in Yahweh or Yeshua, although their critics will evangelize insertion of phantasmagoric fetishisms into secular law.
Was Freudian psychoanalytic theory of sexual stages in psychological development more accurate than accredited? The Michael Jackson Complex is an obvious fixation on mutilation of and deviance with human anatomy in the media. It is indicative of a societal mental illness that caters to the lowest common denominator and generated with Pavlovian behavioral conditioning in popular culture.
Should we really be canonizing special societal privileges in the law based on a person's idolatrous fetishes? Perhaps civil union and homosexual monogamy advocates could conclave to enshrine their own phantasmal state religion and consecrate Michael Jackson as its first Ecumenical Pope!