Veterans have always contributed significantly to the ranks of militias, and there is nothing wrong with that. There is a major effort underway to characterize militias as “white supremacist” organizations, and a domestic terror threat. Yet there is virtually zero violence perpetrated by militias or “patriot groups”, nor any proof that they are any more racist than the population at large. I would say they are far LESS racist than the average BLMer. If you are a member of one, know they they are being aggressively infiltrated by LE, and they will encourage and support acts of violence, even rising to agitating and radicalizing.
FBI has been caught a few times, IIRC, sending snitches into some of them and entrapping folks. With the current crop in the FBI/DOJ it’s definitely happening now.