Yes their religion is definitely an ancient Egyptian thing. Which itself is an ancient Sumerian thing.
I can't help thinking Paul was alluding to the fact "[they] call us sheep."
ROMANS 8
35 Who shall separate us from the love of Christ? Shall trouble or hardship or persecution or famine or nakedness or danger or sword? 36 As it is written: “For your sake we face death all day long; we are considered as sheep to be slaughtered.”