He never put on a nazi costume. It didnt have any insignia on it. It mostly resembled the ww2 British officer uniform.

The nazi salutes were made as a joke in 2016, which was when many of the YouTube content creators were making edgy content (example, filthy frank/maxmoefoe/idubbztv) because people wanted to see and hear edgy content as a backlash to the PC culture that had risen. It was a joke in poor taste, but it was a reaction to pc culture. Not once had pewds endorsed nazis. In fact, he’s multiple times called them out, especially after the Christ church massacre.

And the fiver “death to Jews” was an experiment to show that people would do anything for money and that fiver needed ways to make sure people wouldn’t do worse things using their services. It was in poor taste, I’ll say, but it’s not some neo nazi call to action. He’s an edgy comedian at worst.