Whatever religion posses you will have overlapping symbols that are in conflict with the occult. This is intentional. Occultists create subversive symbols to filter out trojan horse intellectuals (EG: The Church of Satan). People who seem smart and capable of deep thought but are actually being coached by a religion and only wield rational thought to serve their religion are pretty common and undesirable to have around when mindhacking. It also creates an "us-vs-them" paradigm that improves community at the cost of wider social ostracism. Anyone who has argued with a christian trained in apologetics on hot button topics knows what I'm talking about in regards to trojan horse intellectuals. So by adopting "bullshit" (like antichrist worship) that directly conflicts with "other bullshit" they can dereference the pointer to the religious back door. Then occultists build their own back doors and reprogram themselves to do what they want.
Obviously major religions want to be the only answer. As any hacker knows as long as more than one person has admin privledges on a network, there is no guarantee control over that network can be maintained. All major religions say that the apocalypse will start when people turn away from them. The result is increasing radicalization as a religion dies out which helps it hold on a little longer.
As for the Eye. Yeah good luck finding constancy in an interpretation. It's the symbol the visual center of the brain is most tuned to. It's going to be everywhere regardless of whatever meaning people ascribe to it.