If Europe and the rest of the worlds response is to make weapons of war someone will eventually ensure they are used.

Weapons of war are already being used. And not only against soldiers but also civilians. They are used against the people of europe by russia. We shall not let us be slaughtered.

If we let those, that use weapons of war and terror to conquer the world by force, win then it will be those that exist and rule in the future, just like in natural selection we wont have less tyrants with weapons of war, terror and supressiom but more, consequentelly they will be used more.

Additionally, if you want to talk about nuclear weapons then those already exist and again russia who seems to have no problem using any weapon of war, unless they face consequences, has them too. In fact europe should do everything to keep a lunaric like putin as far away from the figurative line, whose overstepping does mean nuclear war, because if we let him step arbitrarily close to that line than it is indeed only a matter of time until that line is overstepped.