The uniting of Christians? Hmmm. The Prophetic Scriptures predict such a time. It occurs in the period of the Great Tribulation, and it occurs under the efforts of the Antichrist. Oh, actually, all the Christians have been removed from earth, and the uniting is of churches. Unholy, ungodly . . . churches.
Studying the life and writings of Watchman Nee might give you a bit more discernment on that. The Christians of China, at one time, believed as do you.
Also, allow me to clarify what I said. I believe that it is crucial for Christians to take a united stand against this administration and other elements of this culture who are anti-Christian in their agenda. Obama is not THE anti-Christ.