There is this focus on certain sins as worse than others. Well that may be so, but the real issue is the first commandment.
Mt 22:37-40 sums up the Ten Commandments into two commandments:
Jesus said unto him, Thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind.
This is the first and great commandment.
And the second is like unto it, Thou shalt love thy neighbour as thyself.
On these two commandments hang all the law and the prophets.
All sin is ultimately the result of us failing in the first commandment. Many of us have temptations, making idols of money and the things that money can by, as an example. Homosexuality is another, but is it worse than heterosexual fornication or adultery? I don't see why it should be.
Can a husband go running off with different women every weekend with the excuse of, "God made me like this."
It is a matter of choosing God and an eternal relationship with God after we leave this mortal body, or not having that relationship.
On the question of "is homosexuality a sin?" well the word used when calling this a sin in the NT is malakos. Calling someone "malaka!" is a swear word in modern Greek.
I think it is something that is between them and God. If they keep harping on their sex life I would get offended, in the same way I would get offended if a heterosexual couple would keep talking about their sex life.