They mean what they say

And “they” are the evil murderers of ISIS and other Islamic terrorist killers.

Here we have ISIS, a murderous, genocidal Islamic supremacy group. They have stated quite openly that they intend to carve a caliphate out for themselves by any means necessary, and by “by any means” they mean as violently as possible. They view the West, Christianity, Secular Humanists, Hindus, everybody who doesn’t conform to their brand of Islam as the enemy, and they have only one tactic for dealing with the enemy : kill them and keep on killing them until they are either all dead or their remnant is so cowed that they convert to Islam. They justify this using the Koran and various Hadiths and they will quite happily tell anyone who will listen exactly what they believe is divine rational for their actions.

The author then describes how the left-leaning intellectuals of the west seem to have a fundamental inability to recognize this reality, an inability that has gotten so profound that it now feeds a blindness that makes them willing to even help these killers in order to avoid seeing them for what they are.

Read it all. The author makes a reasonable effort to understand why the intellectual leadership of the west, in the U.S. and Europe, seems incapable of understanding the threat of Islam. In order to defeat these terrorists, we are going to have to overthrow the blind fools we presently consider our intellectual elite. And to do that we need to see them for the fools they are.