She didn’t. If they weren’t voting for trump she didn’t call them deplorable. Also, she was referring to only a subset of trump voters. She said you could separate trump supporters into two groups, one was a basket of deplorables. They seem fine with "murderers rapist and thieves and some I assume are good people ", but “there are neo nazis supporting this man, we need to reach the non nei nazis on his side” is too far.
I would agree that it was aggressive and alienating. Another issue is that it was extremely easy to take out of context, which it widely has been. It’s so it of context that people who didn’t know the context proudly labeled themselves as “deplorable” showing solidarity with David Duke. Never realizing that’s who the original context was about. But it’s hard to speak in a way that will never be taken out of context. “You didn’t build that” for another example.