The more exclusive your faction is, the better. If you study secret societies a bit, they actually make a lot of sense. Like the degrees of freemasonry. The idea of keeping secrets and having testing to raise people through the ranks, ensures that the important truths are kept extremely secret, yet the lower ranks still enact those secret policies through the chain of command. For the highest tiers of your secret faction, you need to have a ridiculous number of loyalty tests because it is known that the truth is forbidden, so anyone sharing the truth must do so in secret among trusted friends. You can never reveal the truth to the uninitiated because they are all golems who will mindlessly attack and kill you if they suspect you have the truth. The mindraped zombies have been programmed to hate those who have the truth.