Disclaimer: This is not meant to comment or insult anyone else’s spiritual beliefs, but represent my own spiritual understanding.
Lucifer is the son of the demiurge, who gave humanity the forbidden fruit of spirituality that allowed them to discover the existence of countless spirits and gods, as well as the ancestral wisdom that people have. This allowed them to be free from the demiurge and pursue more benevolent deities such as the gods of other countries or even to be secular and focus on philosophy if that was their choice.
The bible is the book of the demiurge and was written to facilitate fear and complacency within the population, but Lucifer helped prevent this by both adding his own wisdom to the book and also influenced it to have small contradictions so the more perceptive people would not fall victim to its trap. He even made sure an accurate depiction of the demiurge’s heaven was mentioned in the book, warning people that their souls would be enslaved and turned into power sources of the demiurge where they would do nothing but worship for eternity. While he would not have been able to keep up the charade and overtly warn his followers of the demiurge’s evil, he made sure the actions of the demiurge and his true evil side would be referenced, with entire cities destroyed and countless people murdered by his actions.
Even now, people calling upon Jesus will have trouble making him appear. If they are lucky, they may get Lucifer in his angelic aspect, which is the energy that is predominant in some churches today. It is also why the dogmatic attitude exists around faith as well, because it’s likely many top officials of the church know the truth and work to prevent it from becoming mainstream knowledge.