Curtailing aid to Ukraine will only prolong the war, Mr Zelensky argues. And it would create risks for the West in its own backyard. There is no way of predicting how the millions of Ukrainian refugees in European countries would react to their country being abandoned. Ukrainians have generally “behaved well” and are “very grateful” to those who sheltered them. They will not forget that generosity. But it would not be a “good story” for Europe if it were to “drive these people into a corner”.
In theory they could turn it into a prolongued guerrilla warfare, although I’m not sure their leadership could rally people towards that.
Running terror groups would likely require less people - just look at the drone bombings of various Russian areas, the bombings of journalists (Darya Dugina and the fellow in Petersburg whose name I forgot), attempted bombing of Zakhar Prilepin all the way in Niznhy Novgorod region