It was a stretegic mistake to get involved in the Israel-Iran war [View all]
Israel was committed to their mission, and they would have completed it with or without the US. Getting involved puts the US in a weaker standing relative to the world and in our long-term dealings with Iran. It will not solve the long term problems with Iran getting nukes.
I think Trump also made a political mistake. He supposedly was committed to world peace and "no stupid wars." This attack completely undermines his position. Bannon and others recognized that. Not sure why Trump fell for it, but I think he was chasing glory against easy target. Iran was already defenseless and Trump, being the bully that he is, couldn't resist kicking them while they were down.
Iran invited attack with their tepid response to the previous flareups with Israel. It became obvious that they were avoiding confrontation when it mattered after years of belligerent talk.
This is not a question of whether Iran "deserved it" because of their past terrorist activity and threats to Israel and US. It's just a question of whether the US should have done it when Israel was already committed to the job.
And with Iran being the "eye for an eye" types, it wouldn't surprise me if they went after US power infrastructure.