He was, maybe situation has changed, new intelligence or something else.
This implies he had intelligence to start with.
Netanyahu attacked Iran, Trump's ego wanted some of the action and no one has dared to call out Israel's aggression.
All true, but I suspect that outside Israel, the US, and Iran and their proxies most countries see this through their own political prisms or self-interest, have little sympathy with either Israel or Iran, and would be happy to see the defeat of the Iran regime.
I am not sure that, in the US, there is a great deal of public support for this direct involvement.