In the wake of the mass shooting at Parkland, Florida’s Marjory Stoneman Douglas High School, something has shifted. The teenagers who witnessed the murders of 17 classmates and faculty members have banded together to launch a widespread movement, complete with school walk-outs, rallies, and soon, a march on Washington. As two of the survivors pointed out to Jordan Klepper Tuesday night, they are uniquely positioned to keep this debate going: these teenagers are old enough to speak for themselves, and they have social media as a platform to share their message.

Perhaps it’s that very effectiveness that has driven some on the far right to smear them, suggesting that the outspoken survivors are backed by George Soros, or are actually “crisis actors.” But the hosts of late night will have none of this—especially Jimmy Kimmel, who had two blunt words for anyone who really believes those theories: “You’re crazy.”

“I want you to consider this,” Kimmel said during his opening monologue Wednesday night. “Especially if you are a Trump supporter or a member of the N.R.A. Do you really think these kids, these teenagers who spoke out after a shooting at their school, are actors who are part of some kind of Deep State left-wing conspiracy? If the answer is, ‘Yes, I do believe that,’ I have some bad news for you. You’re crazy. You’re a crazy person. Your brain is not functioning. And I’m worried about you.”

“If you aren’t crazy,” Kimmel continued, “which most of you aren’t, and you agree that accusing teenagers of being part of some sort of diabolical underground government scheme is nuts, you can’t just sit there and let these scumbags spread these lies about these kids.”

On The Late Show, Stephen Colbert was similarly unmoved by suggestions that the teenagers were acting on anything but their own sincere motivations. He responded to a tweet from former Republican congressman and current CNN contributor Jack Kingston, whose tweet over the weekend seemed to suggest that the students were not planning the rally themselves and were, in fact, backed by Soros. “Jack,” Colbert said, “teenagers are pretty good at planning big gatherings by themselves. I mean, didn’t you ever go to a party in high school? Oh. Oh, never mind; I withdraw the question.”