Last week, flyers popped up all over Florida Atlantic University’s campus, accusing tenured political science and constitutional law professor Marshall DeRosa of being a white supremacist.

The posters, adorned with Confederate flags, claim DeRosa has “ties to Koch Brothers & Hate Group League of the South.” Still others claim he’s a white nationalist. Via phone, DeRosa denied all such labels, saying “the students [involved] are just useful idiots.” Although not certain who put the posters up, two groups have been protesting lately: FAU Democratic Socialists and FAU Student Power. Black Lives Matter activists have demanded DeRosa dissociate from the Charles Koch Foundation and GEO Group Inc. groups he’s affiliated with and receives funding from “on the grounds that both are racist organizations.”