They know they'll be out in a couple weeks. It's only a deterrent if they know they'll do the full five years. They need to remove judges and prison officials discretion in letting these mentally ill goofs out.

The REAL deterrent would be going after the people funding this terrorism. Start seizing their wealth and frog marching them into prison and it would all stop with great quickness.

Side note: I'd walk right over them taking great care to step on their faces if I found this group blocking my way. Might circle back and do it a few times.