I have a different perspective on this, having run several libraries in South Georgia.
I see it as you were asked to wear a mask while in a Government Building and asked by one of the Government employees who didn’t make the policy, but, is made to enforce the policy to keep their job. You reacted poorly to their request and were abusive to someone just doing their job.
Had I been there when you did this, I would have had you banned from the system. In our system, you could be charged with Criminal Trespass if you returned on any Library Property.
I don’t see any value in acting like a Liberal to get your point across. We’re suppose to be Conservative, and, part of that is acting like a grown up, not a spoiled liberal.
“you were asked”
Ordered is the proper word.