Again, the issue here is not threatening harm against those threatening them, it's with threatening (and indeed, actively perpetuating) harm against uninvolved third parties.
Punching back the guy who punched you? Understandable. Lobbing a molotov cocktail into the kitchen, pointing at the guy who punched you and declaring "Look what he made me do! You better stop him!" to onlookers? Completely unhinged.
I don't see Iran attacking Europe or anybody else that they aren't already in or have been in conflict with.
Is it inconvenient? Sure. But if don't want to block the hallway for everyone else you don't start a fight with a guy standing in the hallway. You think if Spain was attacked by a bigger and stronger adversary that they would just let the logistics traffic that feeds the enemy and the enemy's allies pass freely through the Gibraltar strait? Hell no.
Traffic through the strait is certainly not "logistics traffic that feeds the enemy", unless Iran considers the entire world its enemy. Certainly high global oil prices affect the US just as they affect everyone, but these are not US ships being blocked, nor are they bound for the US. The US gets almost all the oil it imports from Canada, South America, and Mexico: https://www.voronoiapp.com/energy/Visualizing-Global-Oil-Tra...
The "blocking the hallway" analogy also fails because this isn't just unavoidable collateral damage; Iran is actively threatening to target ships from these uninvolved third parties.
