You avoided the whole, "got us into a war with a lie arguement."
Biden supported the president at the time not knowing the entire pretext was a lie!
So the question again becomes are you mad at a Democrat being lied to or that the Democrat believed the lie?
Joe Biden’s Iraq problem
Story simplified!
Biden was an Iraq warmonger who helped get thousands of American soldiers killed. Bernie did not. You cannot objectively say that Biden is any different from any other Iraq warmonger. You'd call any Congressional Republican who voted for the war an evil warmonger too. It wouldn't matter whether they voted based upon faulty intelligence or not.
Politically-based double standards that are clearly flawed are hilarious. Trump has gotten us into zero wars since he took office.