The undercurrent of racism and xenophobia in Trump's campaign is to me its scariest aspect. And the worst part of his electoral victory is that those who are racist and xenophobic now feel vindicated and emboldened to do so publicly.
I'm not claiming that "if you voted for Trump then you are racist". But I do think that those who voted for Trump need to acknowledge that this problem exists and that they chose to put it low enough in their list of priorities that it wasn't enough to deter them from voting from Trump.
Prediction: We already saw an uptick in hate crimes this past year. It will be worse this coming year.