Honestly, I think a lot of it is the Cancer we call social media. It infects the minds of the weak. It helps these people find each other, join forces and communicate. Helps them recruit, get their messages out to the masses.
You can say the exact same thing about organized religion.
Given the choice, Ill take religion and the values it teaches over social media any day of the week and 5x on Sunday. This all goes back to good vs evil, right vs wrong, truth vs relativism.
At some point everyone will be forced to pick a side. It can be argued that if you don't pick religion, you are picking social media and the leftist ideology. Good luck in your choice.