While the chances are slim for that to happen, one never knows. Would you support a conventional intervention by nato forces if russia uses tactical nukes in ukraine?

It seems in today world you even build a large defensive alliance, or you die conquered and raped by Russia or other villain state.
UN is useless, as large countries can simply reject any of the decisions.
If Russia nukes Ukraine, we should end the war by accepting Ukraine into NATO instantly.
Ukrainians would probably have to accept that they wont be able to take back their land by force and switch to political pressure instead:(
I dont see a better solution though.