Donald Trump excuses and sympathizes with his supporter who attacked a protester from behind, beating him up.  Trump said the attacker was "fed up" with such disruption, as if the protester caused the attack.  Don't dare protest or we'll beat you up, goes his implied threat.  Further, he went on to say there are millions who are similarly fed up. Fed up with what?  Perhaps constant irate anger without sensible content is wearing in them.  A national brain imbalance of raging mid-brains has millions gone…