It's past time to send a message. IMHO we badly need to send some "white boys" (i.e. non-Muslim, non-Islamists) to the Big House, or even better to Gitmo. There's a danger that the left will successfully spin this as a new "McCarthyism" (of course, despite the posturing, they're deep racists and will have a whole different range of reaction when white-skinned radicals are targeted) so the signature cases will have to be airtight and will have to be handled adroitly.
What's really enraging is that, apart from the conservative press, the MSM has globally ignored this phenomena. For example it's been several years now that we've watched associates of FARC, Hamas, Abu Sayaf, etc, speaking at "anti-war" rallies, and not a peep about it from the mainstream media. Literal warmongers leading "peace" rallies, and ABC-CBS-NBC-NYT-WP-LAT couldn't care less. If remotely similar acts of deception and hypocrisy were carried out in the name of any non-left movement it would be trumpeted in banner headlines.
Ah, I forgot Lynne Stewart. That's a start.