Historical support of the Biblical account is not found in imaginative inventions, such as pyramids being built as grain storehouses by Joseph, the son of Jacob, the central ancestral figure of the Israelites.
Instead, we know that the Biblical account has real historical connections, e.g. to the Hittites in Canaan (as uncovered by Yadin’s archaeological studies of the city of Hazor). This means that the Biblical references to Abraham negotiating with the Hittites can now be considered to historically possible (not impossible as previously thought).
Theory of Joseph building pyramids (which were funerary edifices, not grain stores), puts Joseph – Abraham’s great-great-grandson – ahead of Abraham & Hittites. This is impossible.
We know that the great pyramids were built around 2600 BC. Yet the earliest possible date for Abraham is around 1500 BC. Joseph was the descendant of Abraham, not his ancestor, which a 2600 BC date would imply.
The 1500 BC date for Abraham is founded on the evidence that the Hittites were first in Canaan around 1530 BC. Therefore, they could not have been in Canaan when the pyramids were built, simply because they were not even a recognized people group at that time. That didn’t happen for a thousand years after the pyramids were built.
