Shot answer. I can feel rage in those words, young padawan.
Seriously, you know what's the biggest deal breaker about Islam for most westerners?
Arrogance. Whole thing about the being the only true religion, so much different from the others. Then comes the part where everyone is muslim, just have to embrace it. Humble people don't like that attitude in other people, and since religion is nothing than a product of human thought it's obvious why they don't like religion which is presented in such way.
Second thing is why so srz attitude. For example, what I've wrote here. Some people will rage because of it. But it's just worthless words in spam section of game forum. If I said this in some village in far east Turkey, I would probably die of slow and painful death. Also, elderly islamic men have that beyond annoying attitude, they are always angry and worried about something. It's all product of Islam.