If we sought to base an argument about George Washington and his wife, we should at least start out with facts. We could show who George Washington was, that he had a wife named Martha, when they lived, and continue from there. But if no historian was certain who George Washington was, or if he even had a wife, or when they lived, this would not be a sound basis on which to prove anything. Such is the inherent weakness of Hislop's thesis that papal worship is the worship of Nimrod and his wife.
I saw that a more direct and valid argument against errors in the Roman Catholic Church (or any other group) is the Bible itself, not ancient mythology. For example, the Bible speaks of a minister being "the husband of but one wife" and that "forbidding people to marry" is a doctrine of devils (1 Tim. 3:2; 4:3). This provides a stronger argument against priestly celibacy than trying to show that ancient priests of Semiramis castrated themselves.
While seeking to condemn the paganism of Roman Catholicism, Hislop produced his own myths. By so doing, he theorized that Nimrod, Adonis, Apollo, Attes, Ball-zebub, Bacchus, Cupid, Dagon, Hercules, Januis, Linus, Lucifer, Mars, Merodach, Thithra, Molock, Narcissus, Oannes, Oden, Orion, Osiris, Pluto, Saturn, Teitan, Typhon, Vulcan, Wodan, and Zoraster were all one and the same. By mixing myths, Hislop supposed that Semiramis was the wife of Nimrod and was the same as Aphrodite, Artemis, Astarte, Aurora, Bellona, Ceres, Diana, Easter, Irene, Iris, Juno, Mylitta, Proserpine, Rhea, Venus, and Vesta.
Take enough names, enough stories, and enough centuries; translate from one language to another; and a careless writer of the future might pass on all kinds of misinformation, Gerald Ford, and American president, might be confused with Henry Ford, the car manufacturer. Abraham Lincoln might end up as the inventor of the automobile, the proof being that many cars had the name "Lincoln". The maiden name of Billy Graham’s wife is Bell. She has sometimes gone by the name Ruth Bell Graham. The inventor of the telephone was Alexander Graham Bell. By mixing up names, someone might end up saying Billy Graham was the inventor of the telephone; or that he invented Graham Crackers. In fact, the inventor of Graham Crackers was Sylvester Graham. Again, similarities could be pointed out. Both men were named Graham. Both men were ministers. But the differences make a real difference: Sylvester was a Presbyterian and Billy a Baptist, and they were from different generations.
Building on similarities while ignoring differences is an unsound practice. Atheists have long used this method in an attempt to discredit Christianity altogether, citing examples of pagans who had similar beliefs about universal floods, slain and risen saviors, virgin mothers, heavenly ascensions, holy books, and so on.
As Christians, we don’t reject prayer just because pagans pray to their gods. We don’t reject water baptism just because ancient tribes plunged into water as a religious ritual. We don’t reject the Bible just because pagans believe their writings are holy or sacred.
The Bible mentions things like kneeling in prayer, raising hands, taking off shoes on holy ground, a holy mountain, a holy place in the temple, pillars in front of the temple, offering sacrifices without blemish, a sacred ark, cities of refuge, bring forth water from a rock, laws written on stone, fire appearing on a person’s head, horsed of fire, and the offering of first fruits. Yet, at one time or another, similar things were known among pagans. Does this make the Bible pagan? Of course not!