Retard, this is your problem. This has always been your problem since WW2 when America didn't glass the Soviet Union like it should have done.
Sure, fine, Putin will take Ukraine today, no big deal, Belarus tomorrow, who cares, the Baltic states next week, no huge loss, Poland the week after, might hurt a little, but this bullshit will never stop, this is how Russia has been operating for decades and it won't change, definitely not because some yank halfwit doesn't want to play world police anymore. And all the while goblin nations like Russia grows, America gets smaller, it's fake dollar will be more worthless, it's economy less relevant.
A weaker America, besides said yank halfwit not being able to have his nth burger of the day, will result in growing terror states, oligarchies and whatever the fuck else which will keep trying to push America into an even gayer state than it is right now.
tl;dr
America is the world police either it wants to be such or not and its life depends on it.