> it does puzzle me how people who share far more political DNA with the Nazis keep declaring that others are the "modern Nazis" or Goebbels equivalents

This is a very strong claim to make without support, especially given the history TPUSA had with people who were at best pushing the boundaries of the right. No historical comparison is going match perfectly but it’s hard not to see parallels in the attempts to subvert a democratic political system, demonize minorities, or the justifications they use. TPUSA frequently provided a place for fringe right people to circulate with the larger Republican sphere so while there were worse groups, they certainly weren’t trying to fight that trend.