I have always wondered why many Christians, especially Americans, attack atheism so vehemently but say little about other religions. They talk as if atheism was the greatest lie in existence, yet say nothing about hinduism, buddhism or other such religions.
Then it hit me: Atheists are acceptable targets, while other religions aren't. You can be as "politically incorrect" against atheists as you want because they have no legal privileges (basically anywhere). Attacking some other religion so aggressively would be a lot more problematic.