Trump won with the support of  millions of white voters who don't consider themselves to be bigots, mainly because their day to day lives don't require them to address the question. That's what white privilege looks like; you simply don't have to think about your racial identity, because being white seems normal and natural, as do the social, economic and cultural advantages that accrue to whiteness.  

When civil rights movement, and Black Lives Matter manage to make an impression on these folks--which is more and more frequently--they begin to realize that white privilege is NOT, in fact, invulnerable, natural, or normal at all. Trump spoke to this discomfort, although he addressed it in the language of nationalism and economics not race. 

The important thing to note is that the white nationalists in Charlottesville are addressing this discomfort too, and in fact couldn't exist unless they were.  This is Trump's conundrum. This is the reason for his hideous equivocation.