This is actually a scholarly debate topic which I’ve taken a keen interest in recently. Christianity certainly did copy a good number of features religious iconography from Egyptian native religion such as…
- The icons of the Madonna and child have been proven to have been styled upon Roman/Ptolemaic Egypt images of Isis and the Child-Horus. This has little bearing on actual theology, merely the depiction of the relationship.
-Horus’s birthday, like Mithra and Dionysus, two other Gods with a heavy emphasis eternal life was December 25th.
-During the “Armana” period, there was a single monotheistic sun deity called “Aten” worshiped. He was represented as a Circle rather reminiscent of the Eucharist and more interestingly prayers to him were finished with the word “amen” (pronunciation, rather than how it was written in Demotic.
-The Ancient Egyptian native religion is (to date) the oldest religion with a concept of an eternal judgement after death, leading to paradise or annihilation.
- While Pharaohs/Roman Emperors were “deified”, they were not acknowledged as Gods per say like Jove or Serapis was. Rather, they were believed to be humans that exemplified excellence and the highest standards anyone (like Julius Caesar) or Livia (the wife of Augustus) could ever aspire to and should be emulated by the masses. Surely I am not the only one who can see the parallel to declaring saints there?
It could all be coincidental, since one could also draw some (albit weaker) parallels in Aztec religion. But in truth, no-one really knows and in all truth it probably doesn’t make a fat lot of difference either way.
Edit: That “Horus ruined Christmas” video has a good number of inaccuracies. While it is true in most accounts Isis was not a virgin (she was actually impregnated by a corpse in the form of a bird…long story) and the account of Horus being crucified cannot be verified and to me does seem very unlikely (Osiris was the God of resurrection and renewal, Horus was a God of life) nor was Mithras born of a virgin the other claims are indeed true.