Nobody gains more from the chaos of religious schism than the self-proclaimed protectors of the faith. For every schism a new "religious leader" is created, and with him an army of adherents.
The TTP is an excellent example of this. The schisms we see in the TTP is ostensibly religious, but in reality it is because each of the leaders of the various factions want to rule.
The example of Sierra Leone is absolutely marvellous. This is a population that has rejected exclusionary religion, and instead insisted on unity.
Tolerance in a religion comes about only when the members of said religion cease to condemn those who beleive differently, and accept the truth that all paths lead to God. It doesn't matter if you do good deeds as a muslim, hindu, christian or jew.
For instance i firmly believe that Mother Teresa is jannatti for her deeds. It doesn't matter that she was officially a roman catholic. By deed she fulfilled every aspect of the ideal muslim, and it is my firm belief that she will be judged accordingly in the hereafter.
One of the main reasons that religious intolerance exists is because salvation peddlers insist on creating value for the "stamp" of each religion. And such value is only created by EXCLUSION.
Let's take the example of Islam. Muhammad clearly stated that the only requirement for being considered a muslim is recitation of the kalma. Since this is the easiest thing in the world (one can recite it even if one does not believe - somwething which happened commonly even during Muhammad's life) there is no value of the stamp, since everybody can acquire the stamp without the possibility of a religious "leader" to approve or disapprove.
Later on however, those with an interest in increasing the "brand value" of the stamp, installed themselves as guardians of the gate, and started dictating who is muslim and who is not. They have attempted to create a "copyright" to the stamp of muslim.
Plenty of examples exist in all religions for this type of behaviour. But it is not until one accepts that only God can determine who is muslim or not that one can actually truly ahve peace. Until then, the little kings of the various religious groups continue to create a false wall around their religion and try to "own" the stamp.
Just look at the hubris this actually is. How dare a human being try to make a judgement that belongs to the Creator alone.