In order for all men to work together, which calls for the elimination of intolerance, we must understand the reason, the purpose, of our existence. We must know why we should maintain the integrity of our religions. It explains our purpose in this reality. It does not destroy Christianity, it reinforces it. It does not undermine religions, it legitimizes them.
Religions explain how.
For some to glorify God, for others to reach Nirvana etc., etc. It may not be 'the' reason, but it is temporarily 'a' reason. Religions already are shucking their cloaks of traditions set in thousands of years of tradition. This is truly a sad event. The need to do so does not exist, in fact quite the opposite is true.