Trump went after Carson over facts laid out in Carsons book. Fair game.
Cruz blatantly committed voter fraud and lied about it. Would you be just as dismissive if a campaign did the same thing to Cruz?
Tweeting the news is fair game.
Comparing Carson to a child molester, attacking his faith & character & skills as a surgeon....dirty nasty politics on par with vote fraud and all those lies drove Carson down in the polls.