In the 70's? And your parents themselves haven't drawn the correlation to Amyteville Horror?
I'm sure it happened, but it's strange they or you don't notice the correlation. It's just like the movie.
Check it out.
“And the Lord said unto Moses, Rise up early in the morning, and stand before Pharaoh....and say unto him, Thus saith the Lord....if thou wilt not let my people go, behold, I will send swarms of flies upon thee, and upon thy servants, and upon thy people, and into thy houses....and the Lord did so; and there came a grievous swarm of flies...and....the land was corrupted [destroyed] by reason of the swarm of flies” (Ex. 8:20-24).
The beetle was known in Egypt as a fly. The scarab beetle was the sacred emblem of the sun god Ra and was the symbol of eternal life. But the flies of the forth plague were most likely a blood-sucking breed that spread blindness and disease among the populace that lived along the Nile. Whereas such flies were generally disliked by the Egyptians, they were, nevertheless, revered as the servants (demons?) of Vatchit—the Egyptian "lord of the flies." In this context it's possible that the Hebrew God was administering a threefold judgement: First, of the Egyptians for their veneration of the fly-deities; second, of the sun god Ra—the Egyptian almighty creator; and third, of Vatchit himself, the Egyptian equivalent of Baalzebub (Beelzebub), the very ancient god who, according to various eastern religions, was the Evil god and "lord of the flies."