You're right. I did. I apologize for my previous comment. The idea that the protesters were Cruz supporters is still crazy, but I see that Cruz did criticize Trump's discourse and lay some of the blame on him (without excusing the protesters.)
I disagree with Cruz on this. The protests are about the positions Trump has taken (an with which Cruz has mostly agreed) and about the fact that he is the frontrunner. If Cruz was the frontrunner, the same protests and attacks would likely have been directed his way.