FARGO, N.D. — A North Dakota family has disowned an adult son who attended a gathering of white supremacists that turned violent over the weekend in Charlottesville, Virginia.

Pearce Tefft said in a letter to The Forum newspaper of Fargo that he and his family “loudly repudiate” the “vile, hateful and racist rhetoric and actions” of his 30-year-old son, Peter Tefft. He said his son isn’t welcome at family gatherings until he renounces his “hateful beliefs.”

The son, Peter Tefft, said Monday that he didn’t want to say much about his family’s denunciation.

According to a press release, while Peter Tefft denied his father’s account about him once joking about fascists throwing people into ovens, he acknowledged that he did make a joke about ovens. He called it “a way to get under people’s skin.”