> Whether or not it's a good idea to arrest/fine people who don't wear masks, I know for a fact that it will lead to disproportionately more black and brown people being at best fined/harrassed or at worst killed by police. So I am against it.

In the context of the US, how does this differ from any other law? It sounds to me like this would lead to a situation where if people make it difficult enough to enforce the law then that law will stop applying to them.