If I was to sell a religion would I try to sell one that:
1. Excludes practically everyone that wasn't born Jewish (unless you go through a year long pain-in-the-arse schooling), has literally thousands of laws that are completely illogical, has a G-d that can neither be named, idolized, or compared to anything tangible or recognizable, judges people by their actions not their faiths, and finally does not guarantee forgiveness for past sins no matter how well you repent. Not to mention guarantees a happy ending to everyone not Jewish, as long as you follow seven easy rules.
or
2. Can include every one on this planet with ease, has a handful of laws - easily followed, has a G-d that is named, identified, and easily recognized around the world, and judges by what you believe rather than how you actually treat your fellow man, and finally will forgive all your past sins including rape, murder, child molestations as long as you recognize JC as your savior. Not to mention a guaranteed happy ending, unless you're not a believer of JC, in which a you die a miserable death (Revelations).
If I was a salesmen, which religion would be easier to sell? hmm...
Don't get me wrong, I'm not saying which religion is better. I just recognize the reason why Christianity has flourished over the past two millenia while Judiasm has languished at a constant 6-15 million. Not too mention the Crusades, the Papal States, and an enormous prosthelityzing movement in Christianity all but abscent in Judaism.
Am Israel Chai!!