These folks weren't smart enough to leave their tracking devices at home and a ton of them filmed their crimes. Everyone has a right to remain silent, but it's not going to help in most of these cases where the evidence is so abundant.
What's notable about the capitol mob is the fact that, while yeah, they knew they were attacking congress technically, they figured that doing it in service to a sitting president made it legal somehow.
Needless to say, one of those motivations is a lot scarier than the other.
now they have mountains of pictures and video evidence and are only making a few dozen arrests