Well, naturalisation in most EU countries would involve some other requirements: language knowledge (you'd have to pass an exam) + civic/constitutional exam or integration test + naturally, no criminal record, etc + some countries are quite restrictive on dual-citizenship (i.e. they don't allow it for foreigners, meaning that you would need to renounce your original citizenship).
Visas and residence permits are, of course, easier.
Can you give some specific examples? I would say that, unless you have some additional qualifications (European ancestors, EU spouse and similar), the majority of EU countries actually don't make it that easy. Of course, it depends on your definition of "relatively easy".
Ironically enough, Vilnius is now a very beautiful, safe and high quality of life city that is a better place to live than, probably, quite a lot of American cities..
Well, it is not really a new problem. Stopping-starting nuclear power plants is also slow and costly. Pumped-storage hydroelectricity and industrial batteries are good ways to solve it at the grid level. In addition to the possibility of some local solutions others have mentioned.
NATO would have become a dysfunctional organization. It is not about the Russian fear of NATO. Russian political system cannot get over its loss of an empire, despite us living in the XXI century. It's entirely different root of the problem..
You are delusional. NATO doesn't want anybody to join. It's all eastern Europeans who actively lobbied and had to sweat convincing NATO leaders to accept them. It was voluntary choice of those nations. Why did they choose to join? Because Russia has been threatening and interfering with their way of life, with the desire to be free. Russian invasion of Ukraine just reinforced the desire to be in NATO.
Were German people responsible for Nazis? Russians have been figting Nazis so fiercly during the World War 2 and it is so ironic that they have a Nazis in Kremlin now.. with many supporting them or just doing nothing about it.
Baltics have LNG terminals and can fully supply themselves from alternative gas providers. Tell it to Germans who addicted themselves to the Gazprom drug needle.
Visas and residence permits are, of course, easier.