I do believe these are Lyndon LaRouche disciples, who are still very very active. They show up at any large political event with the intention of making conservatives look like racist. They even show up at Liberal events carrying signs with a photo of Obama with the Hitler mustache, and the unknowing and the media point them out as conservative protestors. They are not. In fact the complete opposite. With Trump, the KKK signs are their Modus operandi.
Anyway that's my 2 cents.