What can offend a German the most?

What words and actions are not acceptable to me? I find it insulting to be called a Nazi, and this is not something that happens often in Germany, as people tend to be quite tolerant.

In Germany, people tend to err on the side of tolerance.

If you called me a Nazi, I would politely ask why you think that. I take offense when my personal space is not respected, which is a common occurrence. I don't like strong odors or loud music in public places, and don't appreciate when my life decisions are questioned. I am also insulted if my reliability and ability to reason are doubted. Additionally, negative talk about my partner or family is highly offensive.

Do not refer to someone from Franconia as a Bavarian.

Most Germans are not passionate patriots, but they take pride in the region they come from. Additionally, it is impolite to be late for appointments, private or business.

Rejecting the Holocaust, praising Nazi Germany, and expecting Germans to accept those views are all wrong.

In Germany, it is seen as disrespectful to be late to a meeting without informing in advance.

produces methane which is a major contributor to global warming

When beer is wasted, it releases methane into the air. This methane is a big factor in global warming.

Claiming to be someone's friend just because you worked together isn't enough. Unless they give you a large amount of money and trust you to return it, you may not be their friend. Heritage or ancestry don't matter here - it stopped being an issue 100 years ago.

We prefer to be quiet in public, unless there's an official event.

Yeah, yeah. Got it. You're German.