The problem with "both sides" arguments is you tacitly admitting your side is wrong when you do that.
Yeah sure the US shouldn't have done those things in the past. But these are past grievances, which is the cornerstone of fascist thinking. "Our present day horrible actions are justified because of the horrible things others have done in the past!"
Whatever US and any other NATO members did wrong in the past doesn't make what Russia is doing today right.
Also, why should Ukrainians suffer so that Russia can expand their empire?
I have no doubt about the ability of fascists to go on and on about past grievances. But what grievance do you have with Ukraine specifically?