If you refused to "mask" – if you questioned "masking" – you found yourself uncomfortably at odds with those who didn't (and did). They considered you a threat to their health at worst and – possibly even worse – a threat to their conformity. By not wearing a "mask," you made them look bad. The refusal to efface your face presented a visual juxtaposition of their willingness to efface theirs.

It showed that they will do whatever they are told to do.

It probably made them feel ashamed – and it certainly made you feel disgusted. Neither being conducive to good feelings between people.