Neo-Nazis, white supremacists, and the Klan organized a "Unite the Right" protest in Charlottesville, because the city was taking down its Confederate monuments. Counter-protesters -- reportedly including some from antifa groups -- mobilized against them. The protesters and counter-protesters fought with one another, and a white supremacist murdered a counter-protester.
Trump said there was blame "on many sides," and claimed there were many "very fine people" marching with the neo-Nazis, the white supremacists, and the Klan. He also agreed with the "Unite the Right" protesters that the Confederate monuments should stay up.
For Trump supporters, this is only a story about the rise of (mostly left-wing) violence from groups like antifa, which is as bad as the neo-Nazis, the white supremacists, and the Klan -- or worse. They're outraged that liberals keep injecting racism into this story. And they're not racists, despite what every liberal tells them every time they leave the cocoon of conservamedia.
The real problems today have less to do with right and left and more to do with reality and fantasy. Here in this thread Trump supporters seem unable even to comprehend the points they claim to be responding to. So we're having a dysfunctional argument in their alternative reality, where events spiraling out of a march for white supremacy have nothing to do with race -- just as Confederate flags and Confederate monuments have nothing to do with race.