Kulturkampf's Fun-Time Philosophy Jamboree! (merged)

[MetalMilitia]

I think you'll find that a lot of people that are outspoken about atheism (Dawkins, Hitchins, etc.) say that all religions are bullshit, but pay special attention to Christianity because it has the most effect on their daily lives.
If Muslims tried to impose their beliefs on US/UK schools/politics/whatever you can bet that it would be shot down in two seconds (possibly not so in England but we're working on it). The fact that Christian values are taken so seriously in, for example, politics really annoys people because of the whole church/state separation thing.

There is also the fact that criticising Islam is far more likely to get you a letter bomb though the mail box, which may put some people off.