Why was the sacrifice of the israelites detestable to egyptians?

The sacrifice of the Israelites was detestable to the Egyptians primarily because they considered the animals involved, particularly sheep, as sacred. The Egyptians worshipped a variety of animal deities, and the act of killing these animals for sacrifice was seen as a profound offense to their religious beliefs. Additionally, the Israelites' practices highlighted their distinct identity and separation from Egyptian culture, which may have further fueled animosity between the two groups.