MSNBC political contributor Dr. Jason Johnson claimed that Fox News prime-time host Tucker Carlson “basically supports terrorism,” during a Thursday night appearance on All In with Chris Hayes.

Carlson sparked controversy earlier this week when he called white supremacy “a conspiracy theory” and argued that the issue is “a hoax.” The comments came days after a mass shooting left over 20 dead in El Paso, Texas, where the shooter left an anti-immigrant manifesto that warned of an invasion.