It's not only the Hitler salute, also the nazi song with all in this Tent. The Oktoberfest is an event that attracts a lot of international tourism, but access to the majority of the Bierzelte is reserved for certain groups of high-ranking politicians and industrialists. Given that Bavaria is a Bundesland where the CSU has always reigned and in recent years also the AfD, both far-right and fascist parties, are not so surprised by scenes like these, which are surely not the first time this has happened.

This happens when, in a misunderstood democracy and freedom, to tolerate those who would eliminate these values, when they could, and even given a voice in parliaments. They are a danger that must be eliminated from public life, because, with their populism and lies, they can eliminate all the civil rights and social advances achieved, as happened in 1933. But apparently, little has been learned. It makes no sense to prohibit Nazi symbols, when on the other hand xeno/homophobic and fascist speeches are tolerated in parliament and disseminated in the media.

https://www.eesc.europa.eu/en/news-media/news/fascism-rise-where-does-it-come-and-how-stop-it-common-european-response