The Harvard Crimson reports:

Chanting “Trans lives matter!” and “Stand up, Fight back!”, roughly 30 Harvard students and Cambridge residents protested the arrival of an anti-transgender “free speech” bus on Harvard’s campus Thursday afternoon.

The bus, co-sponsored by various conservative action groups including the National Organization for Marriage, is touring East Coast cities as part of a campaign to promote “a renewed policy debate [on transgender issues] that tries to accommodate for everyone,” according to Joseph Grabowski, director of communications for the National Organization for Marriage.

Reaching campus around 1 p.m., the bus parked at the intersection of Massachusetts Ave. and Garden St.—across the street from Harvard Hall—where it remained for just under an hour. The protesters gathered to await the vehicle’s arrival, some holding rainbow flags and raising signs reading “Trans is beautiful.”

Featured prominently on the side of the bus, in bold letters, are the words: “It’s Biology: Boys are boys… and always will be. Girls are girls… and always will be. You can’t change sex.”

On Thursday, protesters scrawled in permanent marker over the bus’s lettering with the words “HATE SPEECH BUS,” as well as, “Hate is not welcome here.”

When Grabowski disembarked from the bus, demonstrators crowded around him, making explicit gestures and attempting to drape a rainbow pride flag over his shoulders.

“Unfortunately, it’s a very one-sided policy debate right now because of the fact that the noisy minority has been able to shout down the other side,” Grabowski said to protest.

In an interview earlier this week, Grabowski said he hoped to have “a reasonable discussion” with students at Harvard. Surrounded by demonstrators Thursday, Grabowski said this was unlikely to happen, adding it was now up to “policymakers,” instead of students, to continue the conversation.

While the bus remained parked near Harvard Hall, students and administrators from the Office of BGLTQ Student Life gathered in the Science Center Plaza to hang a banner reading “Trans Lives Matter.” Equipped with markers, BGLTQ Office staffers remained in the Plaza for roughly two hours, inviting anyone who walked by to add their name to the sign.

Over the course of the afternoon, scores of passersby—including Harvard students and faculty—signed the banner and wrote short messages of support.

“ALL the LOVE,” wrote Harvard lecturer Caroline Light, who serves as the director of undergraduate studies for Harvard’s Women, Gender, and Sexuality program.