I think this leaves out cases where there is actual resistance by a larger group. For example, a March 2003 Gallup poll showed that 5% of the US population had made a public opposition to the Iraq war, but 21% had made a public display to support the war. Small minorities can't go directly against more popular movements.
Hong Kong never sustained more than 3.5% of the population for several days. It seems the police response was able to force the number of people participating back below that threshold whenever it surged.