I don't really know how to beat around the bush here so I am just going to come out and ask it. Is it even possible for a German person to passionately scream in order to motivate a group of people without giving off a serious Hitler-esque vibe? It's probably just my limited familiarity with the language and it's inherent aggressiveness, but - putting aside my cultural insensitivity - any person that was in that room and didn't understand what was being said would follow strictly out of fear. Any non-German speaking Jew (soft J) that heard this guy's voice bellowing from the opposing locker room would "sprain his ankle" tripping over a blade of grass before he even got out on the pitch. I don't want to make it sound Carsten Rump is a superiority complex and a broken moral compass away from being capable of dictatorship. However, those subtitles read like someone that is calling for his players to treat a soccer match like the outcome determines the fate of their families so really, how attached is he to reality?
I guess we should just let the past be the past, but - historically speaking - that inspiration speech had an undeniably oppressive tone. Which I suppose, in turn, means that German is a dialect whose reputation will never be fully reparable.