I remember doing research in the print version of the World Factbook back in college days. It was the most accurate and up-to-date info we could get on countries before the Interwebs. RIP.
Because the 'protesters' are all riled up against 'the law' and will see these troops as opponents (like they see ICE). They'll attack the troops first and I firmly believe federal troops will respond (in defense) violently and in unison. That's the training.
Minnesota has no clue how serious a can of whoop-ass they're about to pry open.