The woman at the well was Samaritan, not Jewish, yet Jesus pointed out that she was not married to the man she was living with. He did not expect Gentiles to follow Jewish Law, but that doesn't mean they aren't sinning.
Samaritism was a sect of Judaism.
The woman answered and said, "I have no husband." Jesus [!] said to her, "You have correctly said, 'I have no husband'; for you have had five husbands, and the one whom you now have is not your husband; this you have said truly."
Hardly a rebuke for sinning, but whatever.
And there were many different "organized religions" at that time, but only a couple survived.
There were, but nothing in that region as prominent as Judaism.
Look, I am simply trying to make the point that, while homosexuality may be a sin, so are many things that we as people do on a regular basis, even when we try not to. It seems that, just because homosexuality repulses many people, it is deemed to be a worse sin and so treated differently than the rest. Would you ostracize someone and refuse them equal treatment under the law because they have tattoos or body piercing, or because they happen to be an alcoholic? I doubt you would, yet those things are clearly condemned as sinful in the Bible. Why then should one type of sin and sinner be treated differently than the rest? If one proclaims to be a follower of Jesus Christ, then all sins should be treated equally. It is one's own sensibilities that seems to determine how we deal with our fellow sinners. I, for one, refuse to judge others because I too will be judged. Someone else's sin is not my responsibility. My responsibility is to live my life in such a way as to show my faith and to lead by example, not to treat my fellow man as a lesser being because of sins he or she may be guilty of.
We have human laws to deal with criminals and in our society homosexuality is not a crime as it is in more closed and dark societies in this world. Do any of you advocate criminalizing homosexuality or tattooing or body piercing, etc.? Probably not. So unless a crime is committed, then the Constitution of the United States says people deserve equal treatment under the law. This includes the right to marry. So, if such a right exists, then I see no reason that Jesus, if invited, would not attend a gay wedding. This does not mean he approves of homosexuality, it means he loves both the humans being married. That is the Jesus I have read about in the Bible.