‘Wouldn’t it be great?’ no, not really. It might be necessary, and if so it should be done, but great? Lot’s of Hashem’s creations will die, lots of Jews in E’Y would be under attack, lots of chayalim would be in combat.
War isn’t a game. fighting and killing is an unfortunate necessity, and defending Jews is now a possibility, when it wasn’t for too many generations, but please, it isn’t something to be contemplated like a Purim spiel.