Schiff had plenty of takers. The ensuing encounter is a master class on what happens when a serenely confident man, with full command of the facts, talks to a passionate mob of clueless wonders who don’t know a thing about their supposed cause, and don’t think they should have to. Some of these folks are students, but they sure didn’t think there would be a test.
Schiff doesn’t just engage and defeat these people… he short-circuits them. You can see one or two of them making a visible effort to think, which they abandon after realizing it’s much easier to chant slogans.