The general way to answer this question is to say that Jesus never talked about homosexuality. In other words, he never said it was wrong. Even if that were true, it wouldn’t show that Jesus thought homosexuality was okay. In fact, if one does think that Jesus thought it was okay, you would expect him to say something about such a practice that was widely condemned in the ancient world.
Far from being an argument for Jesus condoning homosexuality, I think the fact that Jesus does not say something is evidence in favor of the fact that he did think it was wrong! Like I said, since homosexuality was widely known to be wrong, why would Jesus have necessarily addressed it? Jesus couldn’t have expressed his views on every single sin.
Jesus never explicitly said that red is a color. Does that mean it isn’t?
Jesus never explicitly said pedophilia or doing meth are sins. Does that mean they aren’t sins?
It could have very well been the case that Jesus did condemn it sometime in his ministry but that it was not recorded in the Bible. A lot of things in Jesus’ life were not recorded. And the Bible itself says that there are many teachings and miracles that Jesus performed that aren’t recorded on paper.
Jesus also followed the Old Testament. And it is common knowledge that the Book of Leviticus condemns homosexuality as a sin. This is further evidence to think that Jesus indeed thought homosexuality was wrong. Also Jesus quotes the story about Sodom and Gomorrah to display God’s wrath. God’s wrath in that story included anger at homosexuality being practiced.
In fact we can go argue that Jesus did actually condemn homosexuality like every other sexual sin outside of heterosexual marriage. When Jesus said words like fornication and the like, the cultural meaning in Greek would have obviously been anything sexual immoral which included homosexuality and things like pedophilia.
Have you not read that He who made them at the beginning made them male and female, and said, “For this reason a man shall leave his father and mother and be joined to his wife, and the two shall become one flesh”? So then, they are no longer two but one flesh. Therefore what God has joined together, let not man separate (Matthew 19:4-6).
Jesus here is defining marriage as between one man and one woman, not one man and one man, one man and two women, and whatever else you can think of.
At this point then, the Christian supporter of homosexuality has a few options :
1. Deny what’s obviously true, the Bible is against homosexuality
2. Accept that the Bible condemns it, even Jesus himself either implicitly or explicitly
3. Try to take Jesus as authoritative and throw out the rest of the Bible.
The problem with three is that there’s no warrant for it. Jesus held that the Old Testament was authoritative and Christianity wouldn’t make since apart from the Old Testament.
Furthermore, you might as well say the Gospels were made up if you claim that the rest of the New Testament is in major error because of tampering. What do I mean? I mean to say that if the rest of the new testament is in major error, then wouldn’t it seem reasonable to conclude that the Gospels themselves are in error because of tampering?
Finally, Jesus told the disciples that he would send the Holy Spirit to inform them and convict them. So what do you know? Homosexuality was condemned by Paul who had seen Jesus face to face. Paul was inspired by The Holy Spirit to write what He wrote. The Holy Spirit gave him the instructions to say that homosexuality is an abomination. If The Holy Spirit thinks that homosexuality is wrong, then Jesus has to think it was wrong in virtue of both of them being God.