Well, I've looked into this, and honestly? From what I've read, idea that this is "fascism" relies on a lot of misinformation and wild speculation.
1. I've seen pictures of the feds, they're wearing patches. They're not "unidentified".
2. There's nothing unusual about law enforcement using unmarked vehicles.
3. We know that many if not all of the people arrested have been hit with federal charges.
4. Assuming this is some kind of "test run" for a power grab come November is premature at best.
Honestly, I'd say this federal response has been pretty restrained, all things considered. A lot of the things these rioters have been doing could very easily be classified as terrorism and/or treason. And since these state and local officials can't or won't stop them from ruining, threatening, or even ending lives... well, I'd say their complaints about "federal overreach" are lol-worthy. Their constituents shouldn't be paying them to let their cities burn. Far as I'm concerned, they're weak and incompetent at best and should be thrown out of office and replaced with people who can actually fulfill their duties.
All Rioters Are Bastards.