Speaking at a press conference, Cruz told reporters he “thinks a campaign bears responsibility for creating an environment [of violence]. When the candidate urges supporters to engage in physical violence, to punch people in the face, the predictable consequence of that is that it escalates.”
I don't disagree with that statement one bit. It does not excuse the violence, but it does state the obvious. If you stand at the podium and say, “I’d like to punch him [a disruptor] in the face, I tell ya.” [Donald Trump, Las Vegas, NV, 22 Feb, 2016] you are inviting your crowd to engage in violence.
When asked about how a disruptor at a rally in November was beaten and choked, Mr. Trump's response was “Maybe he should have been roughed up, because it was absolutely disgusting what he was doing”. That is inviting your crowd to engage in violence.
When you do that, and keep doing it, someone is going to engage in violence.
So, to answer your question, no it has not changed my opinion of Mr. Cruz one bit.
OTOH, it's worth wondering if a President Trump will blame everything on Obama his first couple of years, turnabout is fair play.