Seeing how Trump's primary opponents are jumping on the bandwagon that the agitators started, it is now becoming a sport to the Left to disrupt Trump rallies, knowing that Cruz and the others will be all over it afterwards.
If Cruz instead denounced that behavior, he might contribute to stopping it instead of encouraging more of it by his reactions.
-PJ
You're right and Ted knows damn well he's throwing gas on the flames when he reacts the way he has.