No, let's not. These are labels that Trump supporters typically self-identify with, I'm not the one labeling them as "alt-right," or "neo-nazi." Trump embraced these groups early during the campaign, and continued to do so throughout it. He's refused several times to denounce white supremacist leaders. It's not at all surprising that these types congregate around Trump, it's been a whole lot of not-so-subtle racist dogwhistles from the beginning.
I would've preferred Bernie, but even minus him we had one qualified, experienced candidate, and one reality TV star. They were not equal options. Actions have consequences and now that we're seeing the trainwreck that is the Trump presidency, the people who enthusiastically supported him are having a hard time owning up to reality and taking their share of responsibility for this mess.