With a history of being part of Russia, it was a sore point when the Crimea was transferred to the Ukraine in 54.
Ukraine is a buffer for the Russians and NATO.
Eventually some sort of loose Federation may emerge. Who knows at this point.
But it is not in western interests to arm Ukraine. It is pure folly to do that.
Resources should be for significant trip wires in the Baltic's, Hungary, Romania & Poland for one.