Well, first of all, I think the reason so many people are focused on Christianity is because it's the one religion that managed to come the closest to a true world religion. Truly understanding how or why it works, and why it continues to exert influence even after 2,000 years, offers a payout that's hard to beat: potentially being able to influence the minds of nearly 1/3rd of the world's population.
Second, there is the question of what religion IS in the first place. Is it just a system of rules to live your life by, or is there more to it? Because even though all major religions seem to agree on the basic rules (don't murder, don't steal, etc.), it's clear that such rules aren't enough to live successfully, and they can occasionally become too restrictive, to the point of presenting a burden. However, breaking any of them is not something one should take lightly, because the punishment can be severe.
Perhaps the real power of religion lies in harnessing the global unconscious. A lot of people have managed to gain a lot of power, wealth, and influence by being able to correctly identify trends and riding them long enough to make a name for themselves. But like waves in the ocean, no trend lasts forever, and it is not just about how well you ride the wave when you catch it, but also how well you handle its inevitable reversal.
The question is, who makes the waves? Is there someone in charge of it, or do they just happen all by themselves? Perhaps even the best and brightest do not know the answer, and neither do any of the so-called authorities. But that does not mean they can just be ignored at will, just like the basic rules cannot easily be broken. No authority can remain forever if it only exists by decree, because one day the waves are going to wash it away.
Ultimately, it all seems to come down to the ability to be in the right place at the right time — being able to read the waves well enough to predict their movement patterns, and making the right effort at the right time in order to ride them, and then getting out before they can crush you. No authority can teach you that, because it all comes down to practice.
