To play devils advocate, a comment like that has the potential to put you in the crosshairs of one of these nut jobs the FBI/DHS has told everyone to be on the look out for. There was a large uptick in these domestic terrorist groups calling for retaliation (even though the guy was a Republican), but everyone on the Right has intentionally not mentioned his political affiliation and just said things about the “radical left” just pouring gas on the fire.