No, its quite simple. Islam winks and nods at sexual immorality that Christianity utterly condemns. It really is all about sex.
Seems like selectively immorality such as multiple wives, infiledity of woman is worse than for their men (double standard same as Christian culture), the men seem to want to keep Islamic women virginal but others are fair game, and that iman in London took a pretty strong stand against homosexuality. I don't know if bestiality is as common as some imply.
I agree with you but think there is more to it than that.
Don't forget the Koran suggests that, among other carnal delights, homosexual love is available for the Muslim Martyr in Paradise.