A religion that gave us Gregory of Nyssa, Basil the Great, Seraphim of Sarov, Julian of Norwich, Meister Eckhart, Sojourner Truth, Dorothy Day, Martin Luther King and Coretta Scott King, James Cone, Carter Heyward, Xenia of Petrograd, John the Wonderworker, Innocent of Moscow, Jimmy Carter, Flannery O'Connor and Oscar Romero and beat the Turks back from Vienna can't be all bad.
Still, it's also the religion that gave us Innocent III, the Borgias, Cardinal Richelieu, Billy Graham, Pat Robertson, Jerry Falwell, Kent Hovind, Padre Pio, Jonathan Edwards, Benny Hinn, Martin Luther, John Calvin, Benedict XVI, James Dobson, Hal Lindsey, Luis Palau, Rod Parsley, Nikon of Moscow, Lee Strobel, the Ustaše, the Iron Guard, the Dark Ages, the Crusades, the Inquisition, witch hunts, the Spanish Conquest, the Thirty Years' War, the Holocaust, the Protocols of the Elders of Zion, missionaries, the Index of Prohibited Books, the Traditional Values Coalition, Creation Science, Pius IX, Fred Phelps, Charles Coughlin, George W. Bush, the Defense of Marriage Act, John Paulk, Bill Bright, Tim LaHaye, Ian Paisley, the Southern Baptist Convention, Stephen Harper, Keith Hay, John Hagee, Phyllis Schafly, Randall Terry, Bill Donohue, Gary North, Anita Bryant, the Ku Klux Klan, and Jack Chick.
All in all, I think we'd have been better off without it, provided that its absence didn't allow Islam to conquer the world.