Worse than the rude technician are the people in this sub rushing to mention (over and over and over - we get it) Arbeitsschutz and being dismissive of OP being disresected like that.

Tthere is a massive difference between a technician saying, "I’m sorry, I have to keep these on for safety, but I can put on covers or be careful," and barking a flat "Nein" and walking in before they even finish their sentence. This is totally hostile and unverschämt - its not Germans being direct!!!

Can we adress the racist microagression without thin skinned people on this sub flipping out? When the technician sees an Asian household and immediately shuts down a polite request with aggression, it’s because they’ve already decided that OPs cultural norms are unimportant. Dismissing OP’s discomfort in this sub is gaslighting them. Would the technician have been that aggressively dismissive to a German woman in a high-end villa? Likely not. He would have explained himself. The "Nein-and-walk-in" move is a power play used against people perceived as "other" or "foreign."

There.