I wonder if they had the same Gods. And chose to "keep" their favorites.
I studied theology extensively a few years ago. I came to the conclusion all religions are the same, but the "face" they gave their main God fit what was familiar to their culture.
Or, did their main God fit his/her face to their culture...
Food for thought...
Religions are pretty similar- it comes down to you do good, you get good. Do bad and get bad...
Superficially similar but fundamentally different.
The real/historical definition of Karma is much different from that. Historically speaking, "the downtrodden people are suffering because of their former life". And the former life, very interestingly, has its own former life. It goes on, and on, till the first person with no former life. Question here is, what was the first person (one who has no former life to pay anything for) paying for? Karmic belief is a method of punishing someone without knowing/telling exactly what s/he's being punished for.
So, YOU DO GOOD, YOU GET GOOD, is not to be found in the karmic system of belief. As such, we can't say, all religions are similar. Atleast not at the fundamental level.