So, since there is no treaty, you are perfectly fine with the US stirring up trouble then standing down. Nice! Seems to me, that is what was done in, and to South Vietnam, also. If you are prepared to play the ‘diplomacy’ game, you best be prepared for ALL consequences! If you are going to be isolationist, be FULL isolationist.
No, I am not perfectly fine with the US stirring up trouble, if you are referring to our recent meddling in the affairs of Ukraine. I don't care who runs the Kiev government or with whom it is allied, as it is none of our business.