Your anolagy doesnt exactly work when you consider one of them is a current threat (with nationalist movements across the worlds, including in Germany, being labled as such) while the other is an, considering the debates already going on, absolutely tasteless reference to a 700-year-old conflict.
One activity is banned by law, the other is just purposefully disrespecting local people. Neither are good, but they're nowhere close to each other in severity.
There have been incidents (as far as I'm aware none of them violent or resulting in an arrest) of Hindu symbols being mistaken for swastikas, having lead to multiple (imo unsuccessful) movements trying to make people aware of the differences.
That aside, yes id 100% assume Germans would be unhappy if someone comes to their country constantly making jokes about ww2
Not that I have to assume much there since we're surrounded by countries who didnt exactly lose the war and as such joke much more openly about it xD