Sensible people wear them out of civic duty and fear. Some (also sensible people) chose not to wear them as they have strong beliefs about rights erosion. I'm OK with both as long as the non-mask wearers stay socially distant and outside.
Some anti-mask protestors are **** disturbing racists, some mask wearers are **** disturbing provocateurs (ANTIFA) using masks for identity protection.
I started thinking more about this...and this explanation may be too simple and missing some fundamental psychological concepts such as order's relation with disgust, which is one of the root causes of racism along with the innate biological trait to fear what is different (because of different immune systems and the chances of disease.)
In other words, it's not that simple, hence why my brain keeps trying to find an answer.