Back when I did use social media my accounts were nearly 100% conservative "activist." I only used it to advance a political agenda. European countries will not block someone like me for speech reasons even though I'm diametrically opposed to their government's ideologies.
I'm not trying defend the so called free speech rights of European countries because they're shit for the most part when compared to the United States. But our country has blocked and banned foreigners from entering the country as well many times throughout our history.
Its not unusual for a government to block a foreigner who has an agenda of causing chaos to overthrow a government. In fact that's their job. I wish they would do more of it in the U.S.
If they want to block foreigners from entering I'm fine with that even if I don't agree with it. Its their country, they can do what they want when it comes to non-citizens. But when they stifle their own citizens free speech that is a whole different issue.