Well lets put it this way, if you're going to openly attack a sovereign nation, you'd better have a damn good reason (like intending to depose the leader for using chemical weapons against civilians).
If you're not willing to do that, then why attack them at all? Just leave them alone to keep fucking themselves over and make America great again. I mean that's what Trump kept telling people that they should be doing, at least while it wasn't him calling the shots.