I never even suggested we let them do whatever we want.
That doesn’t mean we provoke them into using their nukes.
Using that logic they can do whatever they want, as long as they back up their 'want' with nukes.
I think there are things we should never let them do, even under threat of nukes. Muscovy needs hard red lines, else they'd just annex everything. Got to call their nuke bluff from time to time.