The trouble with the dynamic we have going is that for the loonie religious types, both the Social Justice and Alt-Right mentalities are a dream come true. You have the crimes and violence of extremists to point at and tell your followers to panic over, you have the nasty deport/kill/nuke them all Alt-Right attitude to point to and say "See? The infidels despise us!" and you have Social Justice to let you successfully infiltrate society under the guise of solidarity when in reality those pacifists are a bunch of push-overs.
Islamic extremism, like any other religious extremism, is not motivated at all by faith. Its motivated, much like anything else, by a bunch of unhinged power-seeking assholes who are out only for themselves. And they just know what to say to their followers to get them to do what they want. There are several fascinating documentaries on the subject of Muslim suicide bombers, and guess what, most of them are just kids or teenagers. Its actually a pretty simple scheme. You take some kid from a goat-fucking family who has had no real worldly experience except the Koran, and just tell them a bunch of lies or better yet dig up some unflattering news stories of people destroying that one thing in the whole world the kid actually unconditionally loves. Then you feed them some simple lies about the afterlife (for the older ones) or tell them the vests aren't actually lethal (for the younger ones) and, boom, instant Shake-and-Bake Jihadi.
In modernized countries, the dynamic changes. White kids shoot up schools all the time over here just because of the struggle of being an aggressive teenager in modern society. Add in the alienation of being born to an immigrant family to the rage of your typical punk and, once again, you have a Jihadi.
How do we fix this? Fucked if I know. Trying to create an ultra-politically correct movement that is all-inclusive like Social Justice clearly just pulls your teeth and leaves you defenseless against infiltrators. Being an asshole about immigration and presuming that muslims are somehow predisposed to violence more than the average punk also just fuels their perception that the western world is out to get them though. At least in America you can often let nature take its course and corrupt the natrualized generation into douchey, gun-toting, fast food-eating assholes like the rest of us are (I've witnessed this firsthand many times, its definitely not impossible). But with Europe and its legacy of cultural guilt for Colonialism, the idea of Europeanization is pretty much verboten.
Edit: Spelling error that was pissing me off.