Re: The problem is that none of the mythologies make any sense unless you are already a believer. So comparing three mythologies that do not make sense to each other will not result in any insights except that they are different.
So true! In fact, comparing fictional religious world-views is as fruitful as trying to compare them based on their relative phase shift of holy or sacred days:
Islam holds Friday to be the holy day / lord's day
Judaism holds Saturday to be the holy/lord's day
Christianity holds Sunday to be the holy/lord's day
(or so I have been told, I grew up in the middle of those three)
So is the phase shift due to the age of origin of the religions? 'cause Judaism predates the other two and holds the middle religious day.
But then again, considering the various calamitous and cliff-like calendar changes from Julian (hail, Caesar!) to Gregorian (hail, popey monkey suits!) and the various calendrical manipulations involved in orthodoxy and non-orthodoxy, it's all baloney / bologna / non-kosher-meat to me!
And have you noticed how this part of the earth likes to use Norse gods (Tieu, Odin, Thor, Frig/Freya, Saturn) and sky-orbs (Sun's day and Moon's day) for the days of the week?
Christian's worship the sun (son?)? Jews are Saturnalians? Muslims and Freya? WTF? Of course, it all makes no sense at all, which makes sense when you consider that it is nonsense at its base.