I think this is something that some people realize in some circles, but it is not spoken about out loud, at least not in the US. I do see more politicians in the Europe stating this part out loud, most recent example being Geert Wilders whose entire platform seems to be based on this.

The most telling part to me is the people of the Muslim world that speak out and get issued death threats (or actually are killed). If there is one thing that is proof of the intolerance of Islam, it is that.