Radical Islamists are calling for the head of Pamela Geller, the organizer of the Muhammad cartoon contest in Garland, Texas.

A chilling online post reportedly written by an American jihadist warns that Geller cannot hide and vows that she will be killed for daring to hold the cartoon contest.

The post also claims that ISIS has trained more than 70 fighters in 15 states, who are ready to launch attacks at a moment's notice.

In a must-see confrontation, a radical London imam who has gone head-to-head previously with Sean Hannity, appeared on the show to face off with Geller. 

Geller said that she has not been contacted by the FBI or the Department of Homeland Security, but she has increased her private security.

"This is a terrorist threat, and the FBI [and] President Obama should provide security," Geller stated.

But Anjem Choudary asserted that Geller is asking for an attack - and capital punishment - by insulting the Prophet Muhammad.

"She should be put before Sharia court and tried," Choudary stated. "And of course she would face capital punishment."

"You cannot continue to go down this road and expect the Muslims to stand back."

"You're just pathetic," Hannity said. "You're evil and pathetic."

Choudary accused the U.S. of being the "champions of murdering innocent people." 

Geller fired back, "[We are] the champions of freedom, sir. Look how you can't take it. You want to kill people."

Watch the fiery "Hannity" clip above.

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