Not to mention, Finland joining NATO two years ago (along with Sweden) resulted in the doubling of the length of Russia's borders with NATO. Russia responded by moving troops away from the border with Finland to go down and fight non-NATO member Ukraine.
The tiny, vulnerable, Baltics joined 20+ years ago - 2 out of 3 of them border Russia.
And not to mention, NATO "expanding eastward" is simply largely the effect of Stalin keeping the eastern European satellite countries behind an iron curtain instead of giving them their promised freedom - they get free > > they join NATO.