A Texas pastor went to a mall in Amarillo on Saturday and heckled a group of children and their parents waiting in line to meet Santa Claus, letting them know that they were really just going to meet a "man in a suit" and that Santa Claus does not exist.

The stunt at the Amarillo mall appears to be the latest in a string of similar acts by 56-year-old David Grisham, a leader of the religious fundamentalist group "Repent Amarillo," whose mission is to "preach the Gospel of Jesus Christ and wage spiritual warfare on the demonic realm," according to its Facebook page.

He's used similar aggressive preaching methods in the past. Grisham previously made headlines when he tried to start a boycott against the city of Houston after Annise Parker, an open lesbian, was elected mayor and an abortion clinic was built in the city.

He also tried to publicly burn a copy of the Quran in Sam Houston Park in Amarillo in 2010, but was foiled by a shirtless skateboarder named Jacob Isom, who swiped the Quran from him at the last moment and told him, "Dude, you have no Quran!"

Grisham never imagined himself as a street preacher, much less one who inspired so much animosity in people. In fact, he was an atheist for the majority of his life after his father died in a plane crash.

But then, in his early-40s, he reunited with his first love, Tracy, and things began to fall into place. He watched M. Night Shyamalan's movie "Signs" and had an epiphany. Everything in his life was foretold. He said he realized falling back in love with Tracy was a revelation from God. Just as he fell back in love with his first human love, he needed to fall back in love with his first spiritual love.

Now, he and Tracy, whom he went on to marry, travel all across the country on their own dime spreading the good word through brash tactics and attention-grabbing stunts, like executing a Santa Claus piñata by firing squad, for which he was later fired from his job as a security guard at a nuclear plant in Amarillo, he said.

"If god told me to go preach to the devil himself in hell, I'd go there," Grisham said. "But my wife said only if we flew Southwest because they have the cheapest tickets."

Grisham said he's received hundreds of death threats since the video went viral, including threats to "stab him in the throat," "bust out his teeth" and shoot him. But the threats show that he accomplished his mission: get Jesus into the Christmas conversation.

"I'm using the platform God is giving me," Grisham said. "With that platform, I can reach more people than a mega-church."

Though it's not the first time Grisham made headlines, Saturday's evangelism mission may be the most viral. The video had been viewed more than 2.5 million times by Monday morning.

Grisham begins the video by introducing himself as a member of Last Frontier Evangelism, an organization he started with Tracy in Anchorage, Alaska, where they recently moved from Amarillo. Grisham goes on to say he wants to tell the children at the mall the "truth that there is no Santa Claus" and that Christmas is about the birth of Jesus Christ.

Grisham then walks up to a group of children and their parents waiting in line to meet Santa and begins his impromptu sermon.

"Kids, I wanted to tell you today that there is no such thing as Santa Claus," Grisham says. "Santa Claus does not exist!"

The children, confused by Grisham's "truth," appear dumbfounded and look to their parents for answers, who are busy trying to ignore the grown man yelling at them.

"The Christmas season is about Jesus. Jesus was born 2,016 years ago. He was born in a manger in a small town called Bethlehem," Grisham continues. "That's the truth about Christmas.

"The man you're going to see today is just a man in a suit dressed up like Santa, but Santa does not exist," Grisham preaches.

He then addressed the children's parents, chastising them for "bearing false witness against God" by substituting the "lie" of Santa Claus for the "truth" of Jesus Christ.

"Don't lie to your children and tell them there's such thing as Santa, when you know in reality that there are no flying reindeer, there is no workshop of the North Pole, there is no elves making toys, that you buy all the gifts and put them under tree," Grisham says.

Grisham believes parents are destroying their children's innocence by lying to them about Santa. This is where his vendetta against Ol' St. Nick becomes a bit personal. He said he believed in Santa as a child, but when he learned Santa didn't exist, his parents lost their credibility in his eyes.

"When I realized that my parents didn't always tell the truth, that became the tipping point for my rebellion," he said. "You should never ever lie to your children. You destroy your credibility as a parent. Santa Claus is more divisive than they realize."

The parents in Amarillo on Saturday, didn't seem convinced.

"That's enough!" one parent yells, prompting others to try to quiet Grisham, too.

Another parent confronts Grisham and tells him to "chill out" and stop. Grisham, unfazed and unashamed, continues preaching.

Things start to get heated, and the frustrated parent tells Grisham he has to go.

"We don't need you over here blabbin' whatever the hell you're blabbin'," the parent says.

Grisham would later post the video to his Facebook, claiming he was "ASSAULTED by parent at Amarillo Texas Mall for telling kids the truth that there is no Santa Clause and that Christmas is about Jesus."

Based on the video's comments (That's Mr Grinch in real life!!!!!! What a Jerk!), it appears as though Grisham didn't win over many hearts or minds.

Grisham, ever faithful servant, said he plans to continue to spread his message at other malls in Texas over the holiday season.