Showing the Nuke card: 'Fuck off, this is not your business.'
Carrot.
Stick.
You want something, I want something.
Oh, and of course sow a fair amount of discord between Western allies. The Russians are waiting for the first Germans to say: "Look, they keep their word. Even if they are currently raping Ukraine, okay. But, then again, you know she dressed provocatively."
Wait until Germany has taken a few hundred thousand Ukrainian refugees and faces an inflation around five to seven percent.
Not to forget, this crisis will get cold, governments in the West will change and you have to get along again. Who knows who handles the White House in a few years.
Wasn't so bad, was it, luv?
Did you know, showing the Nuke stick early (Escalate to De-Escalate) is said to be an invention of a certain meteoric risen Russian politician in his time as Secretary of the Russian National Security Council around 2000?
A brilliant method to madness.