But let’s not pretend it would be any more just for America

Nobody is saying it's justified. It's predictable, expected and a normal way for a superpower to behave. You don't climb into the lion cage and whine about justice when you're mauled. Russia, the USA, whichever is going to act in its interests and the interests of its security. The unjust part is on the aggressor, in this case the USA in Ukraine funding and arming Nazi extremists to threaten Russia for "its interests in the region" and killing hundreds of thousands because it's "cheap" and a "good deal" for them.