The world came together in WWII and decided that Nazis didn’t deserve a place at the table. There’s a difference between “let’s decide whose economic policy is more useful now” and “hey I want everyone to have a nice life and these guys think a large chunk of the world doesn’t deserve to live at all.”
Neonazis love Sabaton, despite Sabaton doing multiple press releases that say “fuck you Nazi scum aren’t welcome”. Same with Rammstein, people hear things about Germany and assume you’re on the side of the genocidal fascists.