@edgarblythe,
This is a tactic used by extreme ideologies on both sides.
The left posts videos of neo-nazis burning crosses. The right posts videos of "illegals" who committed brutal rapes.
Most white Americans, and even most conservative White Americans aren't neo-nazis. A few are. There are, in fact, very few undocumented immigrants who are rapists. A few are.
It is guilt by association.