This whole rabbit hole of rationalism, less wrong, and ziz feels like a fever dream to me. Roaming trans veganist tatical death squads shooting border officers and stabbing 80 year olds with swords. This is the kind of thing where it is warranted that the feds gets every single wiretap, interception, and surveillance possible on everyone involved in the zizian movement.
Split the beliefs from the crime. A bunch of murderers were caught. Given they are dangerous killers, one killing a witness and one faking their death yeah they should get warrants.
This is a free country (disputably) and you should be able to think and say whatever you want, but I also think it is reasonable for law enforcement in the investigation of said crimes to also investigate links to other members in the movement.