smerel: 2 issues with your logic:
“Officially the UN peacekeepers do that and even they don’t really do so.”
So if UN is not doing a good job, all the more need for a NATO.
“From the Russian perspective when they are moving their troop closer and closer to the Russian they are the aggressors.”
Even without Ukraine’s desire to join NATO, Russia has an interest in invading the neighboring countries. That was made clear. And if they are to expand their boundaries, they are bringing themselves closer to NATO countries. Russia will then create new hostilities. If Russia gave up the aggressive behavior there would be less need for NATO. Not the other way around. Russia is using NATO as an excuse. In “negotiations,” US had agreed to scale back defense in Eastern Europe, etc., and Russia didn’t respond. This is not about security, Ukraine is not about to attack Russia or its interests. They want to fit in with the rest of Europe economically, who unlike Russia, respects each others sovereignty.