Always at some point in the story, the person complaining about Muslims says something about how they're offended because those people worship Allah and not God.
For the love of all that is holy, you people worship the same God. Muslims, like Christians and Jews, worship the God of Abraham. Allah is just the Arabic word for God. Arabic Christians also use the word Allah, because he is the same guy.
If you're going to paint all 1.6 billion Muslims on the planet with the same hateful brush, wouldn't you want to know literally the first thing about them?
I'm not saying this isn't a complicated issue, I'm just saying that it's a good idea to know anything, at all, about Islam before shrieking about how all Muslims are monsters.