Actually, looks like you've already CONDEMNED them WITHOUT a trial even though looking at their statements would tell you that they never "ENDORSED" the people you say they did.
Laz had a great response to the tendency to victim blame Trump, be sure to read it:
http://www.freerepublic.com/focus/f-news/3408636/posts
Of course Cruz and Rubio condemned the protestors, they have to do that so they don’t appear blatantly Leftist and at least somewhat pretend to care about the interests of conservatives. Kasich didn’t even bother to acknowledge that the MoveOn scum were to blame at all, he just gave weak platitudes about being opposed to violence.
The cause of the violence is strictly the Leftist thugs in Chicago, and any attempt to shift blame away from the Leftist thugs plays directly into their hands. Cruz’s statement was especially disappointing because he certainly knows how dangerous the Left is, but he thought he needed to differentiate himself from Trump in order to appear more electable and appease the GOP-e. His plan backfired on him horribly, of course.