Russia invaded Ukraine. It then annexed Ukrainian territory.
Why do you think its neighbors want to join NATO.
Didn’t the Ukraine get invited by NATO to join as a member?
How does Russia feel about NATO on its doorstep?
Who caused the coup of the democratically elected, pro-Russian leader to be ousted in 2014?
Who shelled the ethnic Russians civilians in the Donetsk region in 2014 after they started protesting the coup?