Perhaps the crucifixion is an analogy of self transformation.

There is only God/consciousness, and choice has nothing to do with this actuality. A choice made permanent would only hinder potential. Potential is all there is, potential is always becoming, just as knowledge is always expanding. Choices are made through knowledge, therefore, what is a permanent choice?

If all thoughts and actions everywhere and always are no longer owned in the thought of individuality, how does one think and act, do they think and act as if they are God?

You seem to like the word illusion. What is not real or deceptive if all outer occurrences are inner projections? What part of the psyche determines what is real or not real?

The unmanifest, is just that, unmanifested, so how does the one mind come to be? How does mind manifest the unmanifested, or itself? Is all manifestation an Illusion? If so, how does the mind that is of the unmanifest, realize that it is, within itself an illusion? And if it can do this, then anything emanating from the one mind would be an illusion, for it is, in itself illusion.