Why did Mr.Barrack Obama pair Christianity with Islam in the inaugural speech??

"Christians and Muslims": Mr.Barrack Hussein Obama's inaugural speech contained a startling formulation: "The United States is a nation of Christians and Muslims, Jews and Hindus and non-believers." Hugh Fitzgerald comments on it at JihadWatch.org:
Obama delivering his inaugural speech, Jan. 20, 2009.The traditional formulation has always paired "Christians" with "Jews"—"Christians and Jews." Such a blatant change, then, in that traditional formulation is sure to attract notice. It invites inspection. It disturbs.

The order in which these adherents of different faiths are named, and which is paired with the obviously, and rightly, dominant "Christians" (this country, the US, was both founded on Christian or, to include the Old Testament, Judeo-Christian principles, and owes its development right up to the present day to those same ideas, enshrined in our political and legal institutions which are, after all, the best thing America has to offer) both count. …on what basis did Obama make the decision to move up "Muslims" in the ranking, right after, or even possibly paired with, Christians, leaving the Jews demoted, in a sense?

It cannot be on the basis of population, for there are twice as many Jews in the United States as there are Muslims. … Was this one more attempt to impress on the public the notion that we must appease Muslims, we must make of them something they are not in this country, in order to hold onto their loyalty that otherwise is in danger of being lost?

Moreover, A backlash among conservative Christians, including African-American ones, has taken place to the inaugural speech phrase quoted here, reports AOL News. The upset has partly to do with the inclusion of "non-believers" and partly with the list of faiths.