Since when is it liberal to be opposed to Russia? It’s been a conservative Western policy since the Cold War.
You said “directly responsible,” which means all or most of the blame in a given situation. No one uses American English to claim something is directly responsible but not also majority responsible.
Also, I never even actually said that you claimed the US was solely responsible. I just said Russia was solely responsible, because they chose to invade. If you’re conceding you meant the US is solely responsible though and are walking back that inane argument, understood, but maybe just stop licking Putin’s boot and go read a history book for fucks sake.