So the US, Israel, and Germany have been directly involved in this conflict thus far.
Russia is currently in a war with Ukraine as we know, and has announced their support of Iran. North Korea has been sending troops to this conflict. US and much of western Europe is already involved in some way.
China has been reported sending some kind of undisclosed aid to Iran already.
Currently unrelated but Pakistan and India just had a border skirmish. Pakistan does border Iran.
There's a lot of instability and World Wars worth of countries involved already. It truly wouldn't take much to start connecting some of these conflicts. If that happens it gets much bigger
That's how it was meant to work. The president didn't get to order wars like this until after the 1940s.
Congress should only allow the president to act alone only if the homeland is directly attacked by another nation. Not a terrorist from another country, bona fide military forces. And maybe a handful of limited exceptions that directly impact US soil.
Otherwise we should deliberate and take time to think before getting involved in foreign wars. We have no right to try to police the world and it's a massive waste of resources