Won't those other nations just ban freedom.gov?
Nothing stops them from hosting it on fbi.gov, state.gov, etc. It's one thing to block some random .gov site unused for anything else, it's another thing to block a domain used for, say, filing flight plans.
Southern European countries are blocking whole Cloudflare IP ranges because of the massive grip on the government the sports licensing maffia has there. These countries also don't feature any direct flights to America as far as I can tell.
These blocks may cause (temporary) issues for American business relations and tourism, but such side effects may not be considered so problematic if the US leverages their government infrastructure to attack European legislators.