According to Peter Hitchens:
The Atheists must reject Christianity as well as Islam. Alas, for them, Islam responds to their rejection by ignoring them, whereas Christianity tends to retreat before them. And a weakened church laces a vacuum into which Islam can move. Result? The growing power of Islam in our society, our culture, our government, our political parties and our schools, so that an essentially Atheist state pays increasing obeisance to Islam. I’ve said it before and I’ll say it again, the new Atheists, by attacking Christianity, are simply clearing a space for Islam to establish itself in the space they have swept and garnished.