To me, this seems a somewhat whacky claim.
Surely there is enough in the pyramids to prove it is egyptian made?
If it was an altar why is it a pyramid. I actually think I agree with Paul.
And then there's the logic to consider. B doesn't = A.
The pyramid is "B" ofcourse. If God is "A", firstly - you're assuming A=B, which is a faulty premise. Secondly, you are assuming that an altar is a pyramid, I'm afraid that's just too huge a leap of "interpretation". Even if we assume God made the pyramid it would at best be a "possibility". The pyramid itself is not proof of God. The fabric it's made out of --> is another topic.