No, I chose to ignore your second sentence because it is at odds with the fact that Russia (the bear) chose to attack.
It is no more Russia’s business that Ukraine or Finland or Sweden would join NATO than it is mine that you might join AARP or register Democrat.
I might disapprove but it’s not a justification for me to invade your country, rape your women, kidnap your children, and declare your land as mine.
If Ukraine joining NATO in fear of a Russian invasion provoked a Russian invasion then their fears were justified.
Further, since Russia likes to start wars then when they threaten nuclear war it makes sense to take them seriously and any moves they make that look like they’re getting ready to launch missiles should be met with a devastating pre-emptive attack.
OK, you’re either an idiot or troll: because your attempted syllogism contains a nonsequitur.
Geopolitics on a national level does not bear comparison to joining a left of center lobbying group.
And Russia is sensitive to being invaded from the West, see also Napoleon and/or WW 2.