I don't think at the time there was distinction between religion, astrology, science, medicine and healthcare. The priests had the knowledge, while the commoners were mostly illiterate.

During the Predynastic Period pigs were considered unclean in Upper Egypt but were domesticated and eaten in Lower Egypt. During the Dynastic Period Pigs were thought to be unclean in some areas and among the wealthier classes. Herodotus states that people who raised and ate pig were shunned but archaeological evidence suggests that although technically unclean, pork was still popular with many poorer Egyptians.

http://www.ancientegyptonline.co.uk/dietmeat.html

Moses or not, the word "Israel" was found in Egyptian scripts. "Hapiru" king "Yakubu" also mentioned in Egyptian sources - cognates with Hebrew Yaakov.

There are enough evidence, that ancient Egyptians and ancient Israelis had a contact.