You also didn't single-handedly defeat japan, large amount of the army was fighting and losing against the chinese and in the last days of ww2 soviet union joined the war against japan and defeated the best army japan had to offer, so the japanese were going to surrender not just because of american efforts
russia still has lots of nukes at their disposal which acts as nuclear deterrent and many millions would die trying to slice up russia (getting downvoted because of facts, what a joke some people are)
Why wouldn't we celebrate, they just accomplished one hell of a operation, which took 18 months of preparation (btw of course they are gonna be repercussions its war after all)
Yes but do you think ordinary russians want to be in that war dying, I dont think they are psychopathics who just wanna kill and rape