He has more than a passing familiarity with Islam and its practitioners having been the US Attorney for the Southern District of New York when the "Blind Sheik" tried to take down the World Trade Center in 1993 . The "Sheik" and his minions remain in jail.
In his recent article he makes a distinction that I think is very important and had not previously occurred to me.
"...it should by now be perfectly obvious that that there is no “Islam,” at least not if we are talking about a monolithic belief system. There are sects of Islam, all vying for supremacy in what is, in the main, a conquest ideology — with the various splinters having very different ideas about what conquest entails, and with no papal analogue to impose order by decreeing orthodoxy and condemning heterodoxy."
His context for this assertion is the vacuousness of our current administration and its unwillingness to identify the problem. Some major Islamic factions are our enemies and ought to be identified as such. Claiming, as Mrs. Clinton did in the immediate aftermath of the Nice massacre: "Let’s be clear: Islam is not our adversary. Muslims are peaceful and tolerant people and have nothing whatsoever to do with terrorism." is just wrong.
Major factions of Islam are our adversary and we would do well to understand this as clearly as Mr. McCarthy does.