Just infiltrate them and find out who they are.
I’m probably too old to infiltrate.
Also I imagine that one look at me will tell them that I am not them.
I would be suitable for other tasks, but not that particular task.
Judging from their postures in various videos, I’d estimate most of them to be 20 somethings. Not fit. Liberal looking. Nonetheless, in numbers, armed and armored, they are dangerous.