Christians may think that homosexuality is a sin, but they are not raping, shooting, throwing in acid, or hanging gay people.
Oh yes they are. (Just a few examples there.)
OK, I can't verify how many of the people who have attacked an LGBT person lately is a Christian - or claims to be - but many of the most egregious attacks are carried out by people who claim to be "fighting evil" in the name of their religious beliefs, and in the "West" most of those were not Muslims.
No "hangings" that I can think of off hand, though being left tied to a fence might qualify. Throwing acid... hmmm, maybe not, but throwing boiling water, check. Shooting? Numerous. Raping? Numerous. Beating to death, check. Stabbing, yes. Firebombing, yep. I can remember from my childhood people talking of taking baseball bats to the park to beat up fags, and I didn't even know any Muslims then.
So, it's really no surprise that the other poster might have some of that history pop into mind.
Personally, my first thoughts were, "Oh God, not another" without any assumptions about who did it or why. I think most of us can agree that the reasons homicidally crazy people do homicidal things is hard to understand, and I'd go further to state that you can't take the things such a person says as truth in any simple sense.
Many will latch onto individual statements or bits of information as "proof" of their own pet hatreds or prejudices, or fuel for their own ambitions, but simplistic reasoning is usually false and will lead you to bad decisions.
I would recommend that people calling themselves Christians and inciting or carrying out violence would be well served to actually read the teachings of Christ and pay attention. I don't feel qualified to make recommendations to followers of other religious traditions, but I can hope for some good non-violent teaching there as well.