1400 years ago nobody knew hieroglyphs. It was until the 19th century when the hieroglyphs were finally deciphered and Egyptologists could figure-out the true religion of ancient Egyptians.
Divinity and Dieties in Ancient Egypt.
By the early New Kingdom, deification of the living king had become an established practice and the living king could himself be worshiped and supplicated for aid as a god.
Religion in Ancient Egypt: Gods, Myths, and Personal Practice, p 64.
Pharaohs claimed divinity and were worshiped like gods. This was only known recently, however this was portrayed in the Quran 1400 years before it was discovered.
Pharaoh said, “O nobles, I know of no god for you other than myself. So fire-up the bricks for me O Hamaan, and build me a tower, that I may ascend to the God of Moses, though I think he is a liar.”
٣٨ وَقَالَ فِرْعَوْنُ يَا أَيُّهَا الْمَلَأُ مَا عَلِمْتُ لَكُمْ مِنْ إِلَٰهٍ غَيْرِي فَأَوْقِدْ لِي يَا هَامَانُ عَلَى الطِّينِ فَاجْعَلْ لِي صَرْحًا لَعَلِّي أَطَّلِعُ إِلَىٰ إِلَٰهِ مُوسَىٰ وَإِنِّي لَأَظُنُّهُ مِنَ الْكَاذِبِينَ
"O nobles, I know of no god for you other than myself" in this verse Pharaoh claims divinity. Today we know that in the early New Kingdom, Pharaohs were worshiped like gods.
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