Nothing scary about this at all.
Update: apparently already backtracked: https://abcnews.go.com/US/trump-preparing-executive-order-telling-education-secretary-dissolve/story?id=119499614
This might be the normal Trump tactic of floating horrible ideas, so don’t be surprised if it comes back later.
He will have the police arrest them instead of the threat of getting expelled or have the national guard shoot them. Just like they did during the Civil Rights Movement and during the Vietnam War.
https://en.wikipedia.org/wiki/Kent_State_shootings
There’s a muralist, Mike Alewitz, who survived the shooting. There WAS an NPR interview with him that went over it in depth but unfortunately (and rather concerningly to be honest) it seems to have been removed.