DENVER -- A group of Hispanic children were called racist names as they filmed a movie for a local non-profit and several minutes of the rant were caught on tape.

"I'll do more to your Mexican kids, and I'll send them back to Mexico," transient 39-year-old Robert Arnold can be heard yelling in the video. "Back to Mexico, Mother F*****."

"See, he just has a problem with his sexuality," Arnold goes on to say in the video. "It's called a game kids. You wanna learn about real reality?"

Marcos Garibay is the man behind the camera and founder of the non-profit Tomorrow Maker Films. He started filming while he called 911.

"They're harassing kids, calling them illegals, trying to steal our camera equipment," Garibay can be heard telling the dispatcher.

He said they were filming a movie scene with a group of 10 and 12-year-olds when the incident happened Sunday afternoon.

"It was enraging to hear someone talk to these kids that we look at like family," said Garibay.

Garibay and his fiancé, Karen Colato, started the non-profit to help at-risk youth in Commerce City.

The films they produce star children, and the couple describes them as Lord of the Flies meets X-men.

"If we were a group of non-Latino children, I don't think this would have happened," said Colato.

"It was super hard for the kids," said Garibay.

They said a lot of the kids have undocumented parents and believe the hate is no coincidence.

"I feel like it's embolden and empowered a lot of these kinds of closet racists," said Garibay.

Denver Police were able to find and arrest Arnold. He's being held at the Denver County Jail on an outstanding warrant.

WATCH: The raw video of the encounter. [WARNING: The video contains explicit language]:

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