Ok hang on let me get this right.
So Putin was on the border and you say that the West / China / Ukraine needed to "negotiate" with him (we can't call it appeasement because we don't know what he wants), then say that your suspicion (like most) is that Putin wanted to unite the Motherland , which would have meant that 1 of his demands in your "negotiation" would have been the validation of the elections in the Donbas and Crimea (you can claim that you don't know what he would have wanted but then say thats what you suspected anyway as above - but lets not call it appeasement right).
Guess what, this is continue to follow the appeasement outcome with the Nazis before WW2. Ie. we promise we'll just take the Sudenteland, but then when you stop watching and you celebrate your "negotiation", well lets just take the rest, like the Nazis did with Czechslovakia right? Then what, Ukraine falls, and we the world waits until what, they invade Estonia next? Romania? Latvia?