"He's afraid of being challenged on his silly caricatures," Wallis says. "Glenn Beck talks a lot when he doesn't have someone to dialogue with. Is he willing to talk with someone who he doesn't agree with?"
Beck did not answer numerous requests for an interview.
But a prominent evangelical leader says he, too, is suspicious of churches that preach economic and social justice.
Jerry Falwell Jr., president of Liberty University, a Christian college in Virginia, says Jesus wasn't interested in politics. He says that those pastors who preach economic and social justice "are trying to twist the gospel to say the gospel supported socialism."
"Jesus taught that we should give to the poor and support widows, but he never said that we should elect a government that would take money from our neighbor's hand and give it to the poor," Falwell says.
Falwell says that Jesus believed that individuals, not governments, should help the poor.
"If we all did as Jesus did when he helped the poor, we wouldn't need the government," says Falwell, the son of the late evangelical leader, the Rev. Jerry Falwell.
It would be funny, if it weren't so tragic, to hear a right-wing fundamentalist assert, "Jesus wasn't interested in politics."