They have their sights set squarely upon us. For you go after the strongest opponent first. Once they are defeated, the remaining major opponent in your way for world dominance is by far the weaker one that can be dealt with later.
I'm sure Xi is thoroughly convinced that even the U.S. coupled with NATO may be easier than he has thought they were over the last couple of decades.
I do not know what weapons Russia actually has, but I'm willing to bet they are not what we have seen so far. He got rid of the garbage mainly because he thought it would be an easier hoe than it has been. He hasn't turned tail and ran either, which makes me think he has much more to offer up, if he needs to.
China is the much deadlier adversary, and we are wasting munitions and money against Russia who is not really a threat to the U.S.
But even a much weaker opponent can defeat you when the population turns against thee actions being taken. Vietnam was the perfect example of that, and later Afghanistan, Lybia, & Syria have not impressed our adversaries much either. It becomes even worse when you have a total idiot as the Commander in Chief, and Biden is a certifiable idiot. On top of that, the military itself is being hollowed out. They main focusing has been on indoctrinating the personnel with social justice garbage, and you want to know something. That does not win wars, in fact it destroys cohesiveness and moral.
Xi and the CCP have plenty, to have long continuous wet dreams at night.
Correction: Moral should be morale.