If the nation is not capable of preserving itself and reproducing, if it loses it vital bearings and ideals, then it doesn’t need foreign enemies – it will fall apart on its own.
It is wrong to make anyone into an enemy; it is wrong to scare the people of one’s own country with that enemy and try to rally some allies on that basis.
Russia is the biggest country in the world. It would be very difficult to surround it, and the world is changing so fast that it would basically be impossible, even in theory.
