I very much take Dawkins' point as a valid one. But there is one consideration he's missed. Thank Heaven, nowadays racism is unacceptable in polite society. People who wish to continue being racists therefore often find excuses or proxies for racism. Because, at least here in the UK, most Muslims are recent immigrants or close descendants of immigrants of darker pigmentation, opposition to Islam is often used as such a proxy, precisely because being opposed to a particular, or any, religious belief is perfectly in order. The liberal intelligentsia, being liberal and intelligent, is aware of this, and suspects that it may frequently be a motive in criticism of Islam - read Muslims - which it encounters. And it is not rarely right, though in particular cases it may be wrong.