“In those states it will be guerilla attacks.
From who?”
College professors, college students, to start. Even the most red states have 20-25% of the population vote very liberal. Outsiders could also travel to the state.
Those idiots are not going to do a thing in those states. If Utah secedes there will be no violence. Many might leave but that is about it. Now in the major eastern cities and on the left coast things could get dicey...