wouldn't surprise me or he could have just been just been pissed off. blocking the highway and he needed to get somewhere. if he drives slow they slice his tires or break the window...

they were some people slicing tires of people going to the rushmore trump rally.

https://therightscoop.com/protesters-are-slashing-car-tires-to-stop-trump-event-at-mt-rushmore-national-guard-called-out/