There's lots of other talk about this -- and the Virginia ACLU's response to Governor McAuliffe is particularly worth reading -- but I think there's an observation others have missed: I think the real issue is that Trump isn't blaming the Nazi cosplayers exclusively. And why is that "bad"? Because it continues to implicate the Antifa protesters too. Think of when anyone pressed Obama to condemn Black Lives Matter violence: can anyone find an example of Obama doing so explicitly? From the video and tweet above, it seems McAuliffe avoided the question entirely. I think that's the real aim: they won't be satisfied until Trump blames the Illinois Nazis and just the Illinois Nazis, and leaves Antifa completely out of it.
Which, of course, is excusing Antifa. So far Trump is refusing. I hope he continues.