Anybody who seriously wants to understand how mobs of people could have lynched blacks in the past, watch what is happening to Trump.  In those lynchings, the mob members were absolutely convinced that they were 100 percent justified in destroying, killing a person for usually imagined transgressions.  Mob members chanted and hollered in a common voice reinforcing their shared perception of reality ending in the death typically of a tragically innocent victim.  How can this happen?  The general rule is that the killer mob believes they are doing no wrong.  They are good people doing what needs to be done often to protect white women.  True to the method and the process, today's lynchers are absolutely convinced of their moral rectitude and in fact superiority.  Round and round we go.  Human nature still runs the show.  Same old, same old.