I think that there is an effort to show Christians as extremist bent on taking over the US, look at this headline:

ABC News: Film Shows Youths Training to Fight for Jesus

It’s an article about the Jesus Camp documentary:

“I want to see them as radically laying down their lives for the gospel as they are in Palestine, Pakistan and all those different places,” Fisher said. “Because, excuse me, we have the truth.”
“A lot of people die for God,” one camper said, “and they’re not afraid.”
“We’re kinda being trained to be warriors,” said another, “only in a funner way.”

Doesn’t that sound sinister? But you know they are just talking about evangelism. But evidently, there are fears that these kids will be dangerous to our way of life:

“This is an enormous youth movement,” said Lauren Sandler, a secular, liberal feminist from New York City who spent months among the believers researching her new book, “Righteous.”
Sandler says the evangelical youth movement will have a negative impact on the country’s future, because even the most moderate young evangelicals are inflexible on issues such as abortion and gay marriage.
“It’s an absolute, straight-up us-against-them,” Sandler said. “It’s, you’re either with us or you’re against us. … Not only are you a sinner, but you are working for the enemy – the enemy being Satan.”

(Link via Drudge Report)
I tell you what, I think Americans have less to fear from these kids than they do from these and these and these (btw, note the date) and these.