[krapp]

That's moving the goalposts. The inference made by narrator was that the vast majority of Americans supported the Iraq war and any resistance to it was incidental, dismissed and quickly forgotten, that something like the protest incident in OP couldn't happen in the US.

That plays easily into the common narrative of Americans being bloodthirsty or brainwashed by their media but it simply isn't correct. There definitely was a period after 9/11 when any criticism of the government or war against Afghanistan and Iraq was seen as unpatriotic, the Dixie Chicks were cancelled, French fries became Freedom fries, and propaganda like Courtesy of the Red White and Blue became hits. But the US is more complex than many people give it credit for, and there were also protests in the streets and criticism within the media, even people going to Iraq to serve as human shields[0] against their own military.

[0]https://en.wikipedia.org/wiki/Human_shield_action_to_Iraq