Jesus never changed any O.T. laws. What he did was to show up pharisaical additional man-made 'rules' that made keeping God's laws a great burden for the people. He showed the real depth of spiritual meaning behind God's laws. For example, he said that a man thinking about having sex with a woman not his wife was committing adultery in his heart. Jesus raised the bar far higher by exposing the heart's desires and hatreds.
Jesus never mentioned lots of O.T. aspects of keeping God's laws. For example, the scriptures never mentioned abortion (as opposed to miscarriage, which is another matter entirely). Yet all Israel knew that to deliberately take the life of an unborn child, or to kill a new-born baby, violated God's law on the sanctity of human life. Does that mean that the lack of any God-given law on abortion means it's 'neutral'? Of course not!
That's why the first century church produced a document called The Didache which states,
"You shall not kill the foetus by abortion, or destroy the infant
already born." That was because they believed the biblical statement
that God created humans in His image. The Image of God, Personhood
and the Embryo, Calum MacKellar pp 8-10 (SCM Press 2017)
So with homosexuality in the N.T. Jesus does not mention it. Paul and John do. Yet everything said in the N.T. about it agrees with all that is mentioned in the O.T. God's mandate to humanity is to fill the earth with offspring from the sexual union of a man with a woman, who were created in his image. Satan is out to corrupt that image in humanity, and violation of God's wonderful gift of sex is one of his main ways of doing that. The extent to which most societies have now gone in accepting ungodly views of sex would have shocked first century Christians to the core, had they known what would transpire in our day. Imagine them reading this article, published in 2016:
"Over a century ago, G.K. Chesterton pointed out that once we lost our
faith in God, we would lose our humanity as well. This is happening in
front of our eyes. Society is now guided by personal opinions and
feelings, so that what is right for you is okay and nobody ought to
criticise you for that. Satisfying self is the goal of billions of
people, who no longer live to honour God or to put other people before
This is seen especially in the area of family life and human
sexuality. Having got same-sex ‘marriage’ in 2014, our reshapers of
humanity moved on to a new shibboleth issue; transgender. We are being
bombarded with information that if a 5 year old boy feels that he is a
girl, then, yes, he is a girl. Having got homosexual rights accepted
on the basis of the doctrine that ‘people are born that way’, we are
now being told that we must accept ‘gender fluidity’. Whereas God made
us either male or female, Facebook tells us that there are 26
different genders and we can be whatever we wish to be...
Education is now the domain of social engineering. Having rejected
Christianity as the foundation for our laws and morality, those in
control of society are seeking to replace it with their own laws.
Those laws include ostracising those who choose to stay with God’s
laws and who will not be intimidated into keeping quiet about the
immense danger our children are now in, because of modern brainwashing
techniques used upon them." Article by David Robertson, Moderator,
Free Church of Scotland, The Record magazine pp 5-6 January 2016
I do not know your age, but I do know that most Christians of my generation in this part of the world were taught in 1960s schools the biological facts about sexual reproduction, without a word suggesting we indulge in any of the sexual libertarianism today's children are being actively encouraged to experiment with. Perhaps you could consider what influences might be at back of you asking this question? You certainly won't find any such influences in either the O.T. or the N.T. On the contrary, the Greek word pornea in the N.T. covers all sorts of sexual breaking of God's laws, not just fornication or adultery or other sexual matters, but thinking pornographic thoughts. The massive flood of pornography in our world today is a major influence dominating peoples' thinking about sex and homosexuality. Satan is having a field-day corrupting minds regarding sex, and never more-so than with young, easily-impressed minds.
The answer to your question is "Yes, he was". Further, all God's laws against homosexuality are opposed to its practice.