1. Poland and Romania and the Baltics etc. requested to join NATO. They wanted and want yo be part of an alliance to protect themselves from Russia. They were correct as Russia invades non NATO neighbours.
2. Russia bordered a NATO country right from 1999.
3. Ukraine was not going to be accepted to NATO. The last time it applied in 2008, France and Germany rejected its application for fear of “provoking Russia”. The same would happen again if Putin hadn’t invaded.
4. “Historical Russian lands”?
4.1 Both Russia and Ukraine and Belarus descend from Kyivan Rus. They have overlapping lands in which their ancestors lived
4.2 historically, Crimea was occupied longest by Greeks or Tatars. Not Russia.
4.3 Russia occupies historically Finnish land in Karelia, Chinese land in east manchuria, German land in Konigsberg. Are you advocating they return that?
2. Russia bordered a NATO country right from 1999.==
That is what I’m talking about. It is the aggressive move of NATO.
4.1 Both Russia and Ukraine and Belarus descend from Kyivan Rus. They have overlapping lands in which their ancestors lived==
Not Ukraine. You notice that Russia and Belarus have the syllable “Rus” in their names. But Ukraine not. It means Ukraine refused Kievan Rus inheritance. They even changed their name because of it.
4.3 Russia occupies historically Finnish land in Karelia, Chinese land in east Manchuria, German land in Konigsberg. ==
Karelia do not belong to Finland. Rather opposite Finland is just one separate tribe which disconnected from whole. Same is for Estonia.
Eastern Manchuria is not such thing. Chine was agreed with it. Kaliningrad is our trophy for GPW.
But I agree with one thing. The borders are flexible and their lying depends on the forces of country which is ready to defend them.
Russia knows it very well. So any generations of Russians have their big war with West. It is just time for our generation. It will continue in a future too.