Don't you see AfD on the rise there?
The AfD is not only rising because of Nazi sympathy, but also because of protest voters, a literal fuckton of drama around pretty much every other significant party, too many deaths being instrumentalized, and a disfunctional current government.
Latest opinion poll: https://dawum.de/Bundestag/ - so "only" 20% support them.
Most of the people seeing this isn't going to know the context (i.e. this is a protest). If you strip away the context, this is just a blatant public display of the fascist salute, which many there have wanted to do for so long but couldn't because they feared the consequences. This could very well embolden them.
Even german news are full of the orange idiot and his millionaire friends doing their escapades, and you seem to imagine most of the german population sitting there applauding him? "Blatant displays of the fascist salute" are NOT what many here want to do, but what most would like to do without consequences is punching a Nazi straight to their face.
If you haven't realized, many european governments shifted right because the populism of those parties exploited and used the political tensions and the accumulated anger for the past failures of many left and green hardliners very well.
Germans are not more right or have more Nazis than many other European states, and given the hereditary guilt, less than many.