Poland is a country. They aren't responsible for upholding US law. They can do what they want to companies that decide to operate in Poland. Not only can they have their cake and eat it too, they will - unless said companies stop operating there.
https://www.npr.org/sections/thetwo-way/2014/04/12/302337754...
"Google Maps Displays Crimean Border Differently In Russia, U.S."
It's like what Google did in China. They did not want to agree to the censorship terms imposed by the Chinese government so they stopped operating there. (It looks like they are reversing course on this now and may release a censored version soon, but that is neither here nor there)
The Polish government cannot make Twitter do something it does not want to and still permit it to operate in the country. They will have to ban it outright if Twitter does not agree to their terms.
What Twitter wants is irrelevant if it's not within what the local government wants. There's nothing absurd about that.