NASHVILLE, Tenn. — The children of Johnny Cash are asking white supremacists and other hate groups not to wear or use the country singer’s name or image.

In a Wednesday night Facebook post shared by Cash’s daughter Rosanne and son John Carter Cash, they say they were “sickened” to learn a self-proclaimed neo-Nazi was wearing a T-shirt with their father’s name at a white nationalist rally in Charlottesville, Virginia, that erupted into deadly violence.

The post says Cash’s heart “beat with the rhythm of love and social justice” and that Cash would be “horrified at even a casual use of his name or image for an idea or a cause founded in persecution and hatred.”