Well my brother, its a question of faith. If Muslims truly had faith in the Ummah then it would work out, but when you constantly see duplicity amongst leaders and nations then its obvious Muslims would start losing faith, even in the religion itself because of the behaviour of others.
Its like Machiavelli said "It may be observed, that provinces amid the vicissitudes to which they are subject, pass from order into confusion, and afterward recur to a state of order again; for the nature of mundane affairs not allowing them to continue in an even course, when they have arrived at their greatest perfection, they soon begin to decline. In the same manner, having been reduced by disorder, and sunk to their utmost state of depression, unable to descend lower, they, of necessity, reascend; and thus from good they gradually decline to evil, and from evil again return to good. The reason is, that valor produces peace; peace, repose; repose, disorder; disorder, ruin; so from disorder order springs; from order virtue, and from this, glory and good fortune."
The same could be said about Islam, once Muslims have reached their lowest point only then will we demand an Ummah, but until then we have to deal with this nonsense.