Because it's not true. Jeshua was so very specific about many, many, many things in your New Testament, but in terms of Homosexual acts, he was totally silent. And then for you to lump all of that into one carte blanche statement is, well, cheap and taudry, and I think it doesn't do Jeshuah justice.
What a shame.
Matthew 5:30 And if thy right hand offend thee, cut it off, and cast it from thee: for it is profitable for thee that one of thy members should perish, and not that thy whole body should be cast into hell.
Matthew 5 (Blue Letter Bible: KJV - King James Version)
1.of bodies given up to criminal intercourse, because they are as it were members belonging to the harlot's body
Blue Letter Bible - Lexicon
They'll just keep denying unfortunately, even though it's right in front of them. They have eyes that do not see.
They'll focus on the law or Jesus but they won't focus on Romans 1, 1 Corinthians 6:9, Galatians 5:21 or Paul (as if Paul isn't part of the Christian faith or authoritative). They sort of pick and choose and forget that that they are trying to appeal to a Christian audience that isn't going to go along with their interpretation. I have other Bible studies where I found ways to condemn the behavior. They are trying to change the culture and public policy and no one elected them to be pastor and they aren't qualified or called by God.