Actually, I don’t think they believe their nonsense about Islam,
but are actually in support of Islam as an anti-Christian movement.
That’s indisputably true of many liberals and leftists.
However, I think their bête noire is wider than Christianity.
They hate and despise all Western Civilization, with of course America, capitalism and Christianity in many ways the most visible symbols of that civilization.
Christianity, of course, is the foundation of Western Civ. But we could all become atheists tomorrow, and these guys would still hate the rest of Western Civ.