It isn't "a few," that's part of the problem. The entire reason the war is even happening is because the west helped install a Banderite regime after the 2014 coup, which caused Donetsk and Luhansk to secede, sparking a civil war where Kiev began ethnic cleansing against the Donbass region that voted for the former president.

The Minsk agreements could have avoided the war, but both were tanked by Ukraine and the west. Nazis were emboldened by the new Banderite regime. That's also why Ukraine and Israel are such close allies.