A gay California man whose mother is one of the co-organizers of a controversial “straight pride” event is speaking out against her plans.

Matthew Mason of Turlock, California, is urging the city of Modesto to reject a permit for the Stanislaus County Straight Pride Parade/Event, which was submitted last month by a group calling itself the National Straight Pride Coalition.

His adoptive and estranged mother, Mylinda Mason, is working alongside Don Grundmann, a chiropractor who ran unsuccessfully for the U.S. Senate, to coordinate the Aug. 24 event, which is to be held at Modesto’s Graceada Park.

Matthew told The Modesto Bee that he supports the right to free speech and peaceful assembly, but he believes the “straight pride” event has the potential to spark violence given its racist, anti-LGBTQ slant.

On its website, the National Straight Pride Coalition describes “Caucasians” as being “the biological majority of the historical developers and founders of Western Civilization.”

It also argues “current and future generations” are at risk of “being destroyed by the inherent malevolence of the Homosexual Movement.”

“This isn’t ‘straight pride.’ This is hate pride,” Matthew said, according to Fox 40. “Dog whistling to white supremacy... This is not a positive message and this community is committed to positivity, to love, to inclusion and to diversity.”