>>Those men sinned too; hence the sacrifices.
Man O man, so Abraham is now a Sinner to you? (If you mean that in the all have sinned context, point taken, if you mean he was committing a sin (being married to two wives) while God was blessing him, we disagree.)
>>To claim God sanctioned polygamy is crazy.
No, its correct. Abraham was married to two women while being blessed,
Second Samuel Chapter 12
7 And Nathan said to David, Thou art the man. Thus saith the LORD God of Israel, I anointed thee king over Israel, and I delivered thee out of the hand of Saul;
8 And I gave thee thy masters house, and thy masters wives into thy bosom, and gave thee the house of Israel and of Judah; and if that had been too little, I would moreover have given unto thee such and such things.
Then I am crazy.
>>The ten commandments state clearly that adultery is a sin.
Polygamy - (http://dictionary.reference.com/browse/Polygamy)
Adultery - (http://dictionary.reference.com/browse/adultery)
Polygamy is not Adultery.
Words mean things. Rush Limbaugh
>> So having concubines was o.k.?
IF ok means lawful, then Yes they had no law against it.
If you mean moral, then yes for some of the men who practiced this were highly blessed of the lord.
Try this on for size. God commanded Adam to multiply and replenish the earth. That command has never been repealed that I know of. Those who are more righteous keep the commandments to a higher standard, so they multiply more.
(Just for the record, I am not, nor have I ever been in favor of polygamy, but the statements here require that I state the truth that polygamy is biblical, and that Logic supports it, not the polygamy is not Biblical view.)
>> What is the purpose of the commandment against adultery if it was o.k. to have so many wives and concubines?
The purpose of the commandment against Adultery was to keep people from having sex outside of a marriage. (I mean really, you didnt get that?)
Polygamy is a Marriage, just like the first marriage, only you have more than one wife.
Polyandry is a marriage, just like the first marriage only you have more than one husband.
Anti Adultery commandments are a prohibition against Sex outside of a legal union. What is a legal union has changed and now polygamy is illegal. There was no such provision in the Law of Moses, or before.