All of these whirly things did not just pop into existence all by themselves. They had a root cause.

Gary R. Habermas compiled a list of the scholars who discussed the resurrection in the past half century, and 95+% of them agree Paul really wrote and believed Gal. 1 & 2 and 1 Cor. 15. Habermas is the leading scholar today on the resurrection.

A quick example of the exponential improvement of conscience is the fact that child sacrifices are no longer prevalent. In the dictionary a sin need no mention of some faith, for it is enough to know it is acquiescence to temptation and we throw people in jail for some sins.

Modern psychology says there are no such thing as group hallucinations seeing the same thing at the same time. A hallucination is an individual affair going on in their own mind. They are never the same. The apostles walked with Jesus for three years and confirmed with Paul when they met with him their eyewitness testimony of the resurrection of Jesus.

Nirvana is a false view of reality of shutting down your mind. God never asked you to do that. God of the Bible wants you to be spiritually and intellectually active.

It is very much true that the addition of a resurrection of Mithras came after the resurrection of Jesus and Mithras is poorly documented. And of course less than 1% of the human race believe in it, so what is true in God revealing Himself to us would not be so unaccessible.