One thing I hear from Christians more often than anything else is why atheists always seem to focus on their religious belief and not others, particularly Islam. First, at least in the West, Christianity is the dominant religious belief and in the U.S. alone, some 71% identify with the Christian belief. That doesn’t mean that those same people are actual practicing Christians, it’s just that at least here, the influence of Christianity vastly outweighs that of any other religious belief.
People always ask why atheists concentrate so much on Christianity and not on any other religion; notably Islam. I’ve been considering writing on Islam, and it’s not that I have a fear of offending anyone, it’s just a question, for me, of how to present it properly; to give as an objective view as I’m able. 
Conservative Skeptic 