They look over and see how adverse we are to even helping our allies do fighting against a threat on their southern border.
They know we’re weak and contemptible allies.
Given that we have an interest in maintaining free transit, what is it that we’re prepared to do about it?
Instead of supporting them in neutralizing the threat (and yes, don’t be silly, it’s an Iranian threat) we decide to kneecap them.
It’s important to reject the old interventionism, and the dummies like @LindseyGrahamSC and McCain who only wanted to fight so long as it wasn’t in America’s interest.