Sorry to rain on your parade, pedrolio, but there are a couple of counter arguments. It has since been updated in response to e-troon. /me gets out "The Big Book of Explaining Things Properly".
The parting of the red sea
In the orginal hebrew version of this story, Moses led the Jews across the reed sea. The change happened when the text was translated into english many years ago.
e-troon - the Egyptian army was following the Jews with horse and chariots. A marsh is basically just a large lake with plants growing right up to the surface, when the summer kicks in, the marsh can dry up, perhaps just on the surface, sometimes leaving a causeway across with a wall of water to the left and to the right. (sorry, slightly paraphrased). It is possible to sink through when you are too heavy ie. horses and chariots.
Chariots of Fire
In biblical times, there was little in the way of light pollution. (There isn't that much around egypt now anyway) If there was a meteor shower eg. the leonid shower, you have your chariots of fire.
I suppose I asked for that one. I don't know that much about this story and was just putting together an explanation for lights in the sky. /me leaves it at that.
The plague of frogs
See e-troons answer. Rioting frogs should be the least of your worries if the solar system suddenly gains a new family member!
Last but not least, arriving only 5000 years ago.
The arrival of another planet in the solar system would most likely disrupt the orbits of all nearby planets including Earth. From this we would expect to see destabilised orbits shown by changes in the pattern of seasons and therefore weather. Given that we have records of what weather has been doing for much more the 5000 years from natural evidence (eg. tree rings, ice coring etc.), we would have detected such a large change a long time ago!
An explanation for Venus. Included here for posterity. I now now view it as bullshit
Well, IANAP, but it is possible that the funny craters and the spin of Venus can be accounted for by a large meteor strike.
I suppose it doesn't have to be a strike, a meteor passing close enough could have an effect without actually touching the planet. This could also produce scarring if parts break off. I won't say more than "it's possible", because this isn't my field of expertise.