No, Levin and people like Erick Erickson, National Review, and Weekly Standard have all made a handsome living off the backs of rank-and-file conservatives touting conservatism without getting their lily-white hands dirty.
Now we have a candidate that is disrupting the D.C. apple cart, and doing so will simultaneously disrupt the livelihoods of the aforementioned conservative spokespeople.
Some of Levins rhetoric in the last 3 months has been an incendiary.
Now, he is trying to distance himself from his previous comments and act like he was the one attacked.
Of course, he has needed some bridge to get him from his anti-Trump rants to the general election. He may think changing his tone due to the attacks on Trump rally attendees will help him make the jump.