Eh, you can just activate inherent racist impulses for good. Here's an example.

Social-media-ready Youtube video of a Infowars-y "news show." Show the classic picture of Columbus (except darken the flesh tones just enough) with the title: Discoverer of Latin America. Have a white guy sit at a desk with the Serious Look™ on his face with his speech going something like:

For years now, the public school system in this country likes to perpetuate the idea that Christopher Columbus discovered America! You may have heard this yourself growing up. Well, there's a few things the coastal elites made sure got left out of the history lesson. Columbus — whose real name is actually [pronounce in exaggerated Mediterranean accent] Cristoforo Colombo, by the way — did not set foot on any land we now know and love as the United States of America. The fact of the matter is that he sailed — by accident — to the Caribbean, Central America, and South America — on behalf of… the Spanish.

Or something similarly vile to activate the Us vs. Them reflex. Generally, you would never want to incite racial tensions, but that's anodyne compared to shit this guy shovels on a regular basis.