Some Christians give Paul a great deal of importance as a Saint and tent pole of the early church, others just see him as anything from an early Christian commentator/leader to a misogynist embarrassment.

Either way he commented on Christians having sex outside of matrimony (including same gender sex). Not everyone is a Christian.

Paul isn't God the Father he is a man (and presumably a sinner). Jesus according to most Christians is God incarnate and he doesn't mention the topic at all and yet a lot of Christians just can't get enough of talking about it and campaigning against it outside the Christian sphere while not really making so much of a noise about idolatry for example.

Perhaps they don't want to upset Hindus, who didn't really have a big stance against homosexuality until the British introduced their Christian attitudes into the region where it is most practiced.

Jesus never endorsed the actions of the woman caught in adultery. he didn't admonish her either (he forgave her and told her not to do it again) he did admonish the men with rocks about to painfully execute her when they were all guilty of something themselves.

Now if only the blameless can throw stones and the only blameless adult being chose not to, where does that leave the sanctions in Leviticus?

And yet Christians keep referring to Leviticus to justify their judgement on and lobbying against others including people who don't share their beliefs.

The new message wasn't love the sinner hate the sin. It was love your neighbour and repent your sin.

The loudest Christian voices seem to be saying to get the outsider to be repentant we need your cash.