Ok, I have no "pro-Russia" bent at all, I think they are to blame in this whole story as their concerns could've been addressed by diplomacy like most European leaders have been trying to say... but do you really not know why Russia doesn't want NATO to expand to Ukraine and how it might think war is a justifiable way to stop that from happening? And if that's the case, how it might be prudent of NATO to avoid expanding or insinuating it might do so, to avoid making things even worse than they've already been (with Krimea and Eastern Ukraine in a war situation for several years)?
It's hard to do so, but try to imagine yourself being a decision maker on the Russian side. Seeing an extremely important, historically aligned neighbour that has a very large, geographically un-obstructed border with you, and who can block your access to extremely important maritime routes, trying to join a military alliance who sees you as one of their main enemies.
While I may not agree with the Russians, I can absolutely understand why they think war is justifiable and I can totally see how NATO nations should do everything it can to avoid this war, they have nothing to lose, while Russia has a lot at stake... sometimes, it's a wise move to back off your expansion to avoid loss of life and making the situation much, much worse (imagine a world with Russian-occupied Ukraine for years to come)... when it all could've been avoided by a mostly symbolic back off as the Russians demand (symbolic because there was very little hope for Ukraine to actually join NATO in the near future, to my knowledge).
I highly recommend the Caspian Report channel on YT and its series on this conflict to understand the motivations on each side: https://www.youtube.com/watch?v=UNIU6TRsRzk
