The Jade Helm 15 conspiracy theory is a ridiculous fantasy that the military is plotting an armed takeover of America. Not to be confused with the actual increase in militarization and arming of the police who already have authority in America.
Systemic racism doesn’t mean white men in suits having secret meetings to decide how racism happens. The murder of Sam DuBose was clearly unpremeditated and spontaneous. It’s also clearly related to the overwhelming dehumanization of black people throughout American history, the normalization of immediately using violence to deal with them, police forces that are willing to cover for each other, and so on; snap decisions made with the weight of enough racist psychology behind them don’t demand conspiracy theories.
Re: Trump rhetoric comparisons to fascism: America’s origin-story villains, the Nazis, are always portrayed as cold, unfeeling machines, because we don’t want to admit that the greatest evils of history are committed by passionate, patriotic people motivated by righteous anger and simplistic good vs. evil views. Because what’s more American than that?