What cultural faux pas should I try to avoid making in Graz?

"In Graz, it is important to be aware of locals’ customs and polite behavior. Refrain from addressing strangers with nicknames, such as "Honey" or "Sweety", as it is generally seen as impolite. Furthermore, pointing at someone with your index finger is considered rude, so it is important to use your entire hand when gesturing at someone. Additionally, avoid talking loudly in restaurants or public transportation, as this can be disruptive to other people. And lastly, to be respectful of the country’s history, do not make jokes or inappropriate comments about the Second World War or Nazi Germany in casual conversations," said another expat in Graz, Austria, Austria.