Blinken was Democratic staff director for the US Senate Foreign Relations Committee the year that Biden chaired the committee and whipped Democratic support for the war. He has never criticized the decision to go to Iraq or ever suggested he was against it.
Playing in a band called "coalition of the willing" is the cherry on top.
I was against the invasion of Afghanistan. I thought it was using dynamite when a scalpel was needed.
I yelled at the TV when they tried to pull the BS justification of invasion of Iraq.
I yelled at McCain and co when they played Obama into getting us into Syria.
I grimace every time some idiot starts talking about Iran.
Between my borderline atheism and my proclivity to not using our military as a penis extender guilt suppressor, my chances in politics are pretty limited to local work.
Everyone else? Not so much. The US loves a good war. Especially easy ones that play well on TV.
By nature, we are a murderous, cowardly society and any chance to form a Freedom loving missile launching blow up some civilian Ska band is just the way things work around here.
The issue you have is your candidate pool of public officials who went on record of being against the Iraq war is small. During the time period in question, you could not have a job on that committee unless you had a secret stash of those Gulf War 1 t-shirts with wire diagrams of Stealth Fighter and a Schwarzkopf quote on the back.
I'd like to point out that he was Staff Director. It's like you are pissed that the office manager of local bank didn't publicly apologize for the Mortgage crisis.
I'd also like to point out that it's a band name.