Yes that tends to be what an informant is.
There is a difference between that and the other thing. People who were/are literally state operatives - whatever the agency may be - amongst these people as well. Surely an on going state of affairs. This was a big thing back in the 60’s and 70’s with various left wing groups and also like the KKK. Today it’s probably mostly going on with various right wing groups, but also some leftwing groups I’m sure. Probably on college campuses. The thing is that there isn’t really a leftwing equivalent of like the militia movement. Before AW right wingers get mad at me, yes I am aware of militant left wingers. The scale simply is not the same.
anyway, there is no doubt that feds were involved in stitching up people vis a vis January 6th. Also and this is worth mentioning as well. Lots of law enforcement and various other people associated with the security apparatus that are sympathetic to the Jan 6th people. Pretty good web of stuff going on. IMO.