I have a much better idea of morality than Divine Command Theory (care to answer the Euthyphro dilemma?), that's for sure.
Morality really isn't a difficult thing to comprehend, especially when we approach it from a practical ethics standpoint. If we take wellbeing as an axiom, then we can aim to maximise wellbeing of society, and minimise the opposite of that. Incest usually comes with the issue of deformed children, power dynamics, issues with the family structure, etc, where homosexuality has none of these. Let's not act like you're against incest when you follow an ideology which allows cousin marriage, and the having of children is promoted greatly in Islam.
Of course, Abrahamic faiths in general are very anti-homosexuality, it is just that Muslims are typically more devout/less cherry-picky than Christians and Jews, so the logical conclusion of Islam is generally seen a lot more.
I have known a few, but known one fairly closely, he was a college at a part-time job I had. He had many relations with men, and considered himself Muslim. Be careful if you want to call takfir on him, as that is a sin.
