Some of my best friends are Muslims. Or rather, some of my best friends were Muslims—not that they are no longer Muslims but that they are no longer my friends. The problem I had over years of friendship had to do with certain personal attributes which I value highly, namely, consistency and the ability to recognize facts. My friends were good men who believed in Western democratic values, in selective immigration policies based on the possession of needed skills that would contribute to both society and the economy, in the necessity for Muslim (and all) immigrants to assimilate into the...