Then by definition, Christ, God, went to one (which one?) of the four hells? God went to hell? God died? Was killed? Then would not death be an example of mutability? Of change?
And if “While Christ has a human nature and a divine nature, they are inseperable. You cannot take away the human nature from the divine nature.”, that human nature with the divine, would have “returned to heaven where he is seated at the right hand of the father”.
That flesh and blood human nature is in heaven?
But again how can God gain (or now have a human nature in addition to the divine nature) and retain it if He is immutable?
“God went to hell?”
Yes, he certainly did.
“Then would not death be an example of mutability? Of change?”
So is the incarnation.
“That flesh and blood human nature is in heaven?”
Indeed. For the resurrection is of the body, cleansed and purified and incorrrupt.
“But again how can God gain (or now have a human nature in addition to the divine nature) and retain it if He is immutable?”
By choosing to become man. The incarnation isn’t a temporary cloak to be tossed off after death. It was permanent.