who is going to enforce it?

In an ideal world, the community. In our current world, the government must require businesses to require customers to wear masks and social distance, and threaten them with suspending their business if they do not comply.

the impact the constant stream of conflict has on low level employees who end up responsible for this enforcement

It will not be constant. Places where this was enforced strictly did not have that trouble. It is the wishy-washy enforcement that empowered people to do this. It will be a short lived protest that dies out quickly, and the suffering will be far easier than that of covid deaths.

For those who want to protect themselves, N95 masks are highly effective when used properly

From my understanding, it is not enough. A person sharing a public space with you and not wearing a mask poses a threat, and this threat is massive if they are carrying the virus (even if non-symptomatic).

People must not have the freedom to cause the death or others by spreading respiratory viruses due to childish irresponsibility because their favorite youtuber said so.