I don't like this guilt-by-association game between white hate groups and Trump one bit. Trump is the only white Republican running other than Kasich, and the toughest on illegal immigration, which is a major issue for these hate groups (they want to "send everyone back where they came from"). Of course they support him. That doesn't say anything nefarious about him.
Obama was supported by plenty of radical black separatist groups in 2008. Hillary has the support of some insane feminist groups that think men should be eradicated and women artificially inseminated to carry on the species. Carson is supported by creepy religious cults that abuse children and want to murder all homosexuals and Jews. There are plenty of awful groups in the United States and I'm sure their support is spread around enough that you can tar anyone in this fashion. Who does the Westboro Baptist Church support? Who does Jihad Watch support? Who does Kingdom Identity Ministries support? Who does the New Black Panther Party support? Who do the Crips and the Bloods and the Mexican Mafia support?
That is what happens when Trump slow-walks his so-called disavowal of white supremacist groups, first claiming he "didn't know" enough about David Duke or such groups to disavow them. Then he tried blaming a faulty earpiece. LOL, he must really think we are dumb.