I don't mean to defend those who stormed the capitol, who to be clear I don't agree with, but the important thing to note here is sense of powerlessness. These people felt powerless, regardless of whether or not they were in any kind of objective sense, and that feeling motivated their actions.

This is relevant to the current discussion inasmuch as FB (and social media generally) may have contributed to, stoked and fomented said feelings of powerlessness for the sake of engagement / eyeballs / ad clicks.