Well there's your problem.
You do realize that chimpanzees are genetically much closer to us than any aliens could possibly be, don't you?
Except by some amazing (read: impossible) fluke, you could substitute any known life form for "chimpanzees" in the above sentence.
There was no war...
I think you mean: "We have always been at war with East Asia"
We know that the Egyptians were really good at keepin records. Like "small family of farmers came in to Egypt to get some grain" kind of good records. And yet, there is no mention of 1000's of Hebrew slaves existing in Egypt, let along escaping, let alone the plagues that were supposedly brought upon the pharaoh, let alone the parting of the sea and murder of 100's (or maybe 1000's) of soldiers when the sea collapsed.
And then there's the lack of archaeological evidence of a large group of people "wandering" the deserts for 40 years.