Dee Snider has been dropped from the lineup of San Francisco’s official LGBTQ Pride festivities after the Twisted Sister founding member expressed support for a “transphobic statement” shared on social media by fellow ‘80s rocker Paul Stanley of KISS.

The announcement came just as the organization was getting ready to reveal that a Twisted Sister classic would be featured prominently during the city’s 53rd annual rainbow-powered celebration — one of the nation’s largest Pride events.

“San Francisco Pride was on the cusp of announcing Twisted Sister’s ‘We’re Not Gonna Take It’ as the unofficial rallying cry of this year’s SF Pride Parade & Celebration,” Suzanne Ford, executive director of SF Pride, said in a statement Tuesday. “The band’s frontman Dee Snider [was scheduled to perform] the song on our center stage. Dee has always been a vocal supporter of LGBTQ+ rights.”

But that all changed over the weekend when the 68-year-old glam rocker reacted to a statement shared by Stanley on social media.

In a long message titled ”My thoughts on what I’m seeing,” the KISS singer-guitarist slammed adults who support trans youth seeking gender-affirming care, calling it “a sad and dangerous fad.”

Gender-affirming care is “a supportive form of healthcare” that improves “the mental health and overall well-being of gender-diverse children and adolescents,” according to the U.S. Department of Health and Human Services. It’s backed by nearly all major medical associations in the U.S.

Stanley’s statement was praised by Snider, who retweeted the message adding, “You know what? There was a time where [sic] I ‘felt pretty’ too. Glad my parents didn’t jump to any rash conclusions! Well said, @PaulStanleyLive.”

“We were heartbroken and angry,” Ford said Tuesday. “The message perpetuated by that tweet casts doubt on young trans people’s ability to self-identify their gender.”

Ford, who’s trans, noted the rampant hate and violence trans people — particularly trans women of color — face across the U.S.

“With transphobia proliferating and becoming more and more enshrined in law throughout the country — we have to stand up for the most impacted among us,” she said, adding that SF Pride and the Twisted Sister rocker “have mutually agreed to part ways.”

The city’s two-day Pride Celebration will take place on June 24 and 25 at San Francisco’s Civic Center Plaza and surrounding neighborhood.