It’s out of control because Putin won’t let Ukraine alone. He’s been trying to take over all of the former Soviet Union. This isn’t an isolated incident; it’s a pattern of reestablishing Russia (i.e., Putin) dominance.
Ukraine has always been closely knit with Russia...so no surprise Putin's put his foot down at Nato/US interfering in Ukraine's politics and taking over of it's Governance. We'd do likewise if Putin did so in Canada or any other nation we're allied with...and we do just that. Cuba comes to mind...and other nations such as Libya, Syria, Iraq, etc, etc, What Putin is doing is no different then what Nato/Eu/US is doing on the World stage....all parties scrambling for dominance...and fair game for them all in their eyes.