Trump and his supporters need to denounce these scum loudly and long. No one can be blamed if repugnant people support them, but they can be blamed if they do not disavow that support. And we have Trump supporters here trying to defend their actions.
They had many, MANY chances to do so during the 2016 primaries and general election. (When David Duke endorsed Trump, when the Klan newspaper endorsed Trump, when alt-right leaders robocalled for him with explicitly white nationalist calls, etc, etc, etc).
How many times does he have to not denounce these things... before one understands that he doesn't disapprove of this type of this.
Heck, he's got Bannon at the White House... the guy who made Breitbart 'home of the alt-right' and employed Milo Yiannopoulos. I mean, for Pete's sake... look at it!