From the article he refers to:
“As for the company Brady keeps Downstate, he shared the bill with Beverly Perlson, organizer of Band of Mothers , a soliders’ support group. Fine. But Perlson once carried an “Al Qaeda Loves Nancy Pelosi” sign at a Washington, D.C., protest, and she told the News-Tribune that Obama is “going around the country and telling everyone we are not a Christian nation.”
“That’s something that’s very important to me. And I’ve said before that one of the great strengths of the United States is - although as I mentioned, we have a very large Christian population, we do not consider ourselves a Christian nation or a Jewish nation or a Muslim nation; we consider ourselves a nation of citizens who are bound by ideals and a set of values.” - Barack Obama
True, we have Buddhists in America; we have Hindus in America; we have Muslims in America. However, the philosophy of the Buddha contributed nothing to American laws, customs, or culture. Hinduism contributed nothing to American laws, customs, or culture. Sharia contributed nothing to American laws, customs or culture (thank God!). Like it or not, the laws, customs and culture of America are directly derived from Christianity, and ultimately from Judaism. No non-Christian culture ever came up with the idea of the equality of all people, nor with the idea that there is a Power higher than the government. When we lose that, we've lost America.