Sometimes, war is necessary and early action prevents a far worse outcome. You could argue that if Hitler had been dealt with earlier (e.g. when he invaded Pola

Sometimes, war is necessary and early action prevents a far worse outcome. You could argue that if Hitler had been dealt with earlier (e.g. when he invaded Poland), he would not have been able to get started causing such a rampage. But fear and inaction by other European powers at the time caused him to be emboldened by early success, and to pick off neighbors one by one. I would argue Russia is in a very similar position today, and if we don't act decisively now, we're just enabling Putin to do far more damage in the long run. The risk of WWIII and a nuclear exchange does exist, but the risk of on inaction is just as high.