Jonah Goldberg makes a pretty good case that Father Charles Coughlin was a man of the left. Apparently he advocated for the typical social programs, and his complaint against FDR was that the New Deal was not going far enough. He was no libertarian free marketeer.
Von Brunn is batshit crazy and his views have nothing to do with modern conservatism.
BTW, has the security guard who shot Von Brunn after the latter shot Johns been identified? That person is a major hero.