Your link doesn't show that the Republican party praises Hitler. Everybody involved in that story was condemned by mainstream Republicans. The one elected official was told to step down by the Republican governor of Vermont, and he did. You can find radical voices on the left who praise Stalin or the IRGC. That doesn't mean those views are mainstream in the party.
>He shard a video of a podcaster arguing Hitler had no desire to exterminate Jews and the Holocaust deaths were logistical failures.
The episode covered a lot of material that had nothing to do with WW2 or the Holocaust and Elon never endorsed any particular claims in it. In any case, Elon took down the post and put up a community note debunking Cooper's argument after people pointed it out.
You can find the episode here: https://tuckercarlson.com/tucker-show-darryl-cooper
>His comments in Germany about too much past guilt.
I agree with it. Why should people people feel guilty for the actions of others? It serves no purpose other than to further mass immigration. Elon Musk wants to end mass immigration into western countries which is why he supports right wing political parties in Europe and America. That doesn't make him or those political parties "nazi". You can oppose mass immigration without being a nazi.