If tyrannical/terrorist regimes such as Iran or Syria or North Korea try to do pre-emptive wars then they must be destroyed pre-emptively by the United States.
Just war is a basic principle. Justify pre-emption for your own nation, and another nation like a great Russian bear will use the same to justify pre-emptive strikes. Such has already happened many times. We used to condemn it, but now it is “the Bush doctrine” and it is a terrible mistake in tactics and philosophy.