Under normal circumstances, one would conclude that man was mentally ill.
But these aren't normal circumstances.
While I reserve the option that those people may simply be scared out of their wits, what is more likely is that man and his wife, are, in all likelihood, Leftists. And that explains it all.
They think that because they feel they are somehow on the side of "the greater good", they are empowered and justified to act out in whatever fashion they wish.
And that mindset is a real danger to our Republic. Fortunately, we have Americans who at this point, like you...won't stand for it.
But decades of indoctrination of young people puts that resistance to tyranny in peril.
As Montesquieu said: "The harshest tyranny is that which acts under the protection of legality and the banner of justice."
Probably even more meaningful under the current circumstances is this quote by C.S. Lewis:
“Of all tyrannies, a tyranny sincerely exercised for the good of its victims may be the most oppressive. It would be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated; but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience.”
And it’s getting worse. The more “empowered” they feel , the more they’ll do it. They’ll go off the deep end if Trump wins.