Experiencing separation and being separated are two completely different things. For some reason, it appears that, the vast majority of people who claim Christ, have no idea who He is. We cannot both conclude that He is God, and then also claim that He is not God. We cannot say that God ceased being God when God was in Christ reconciling the world to Himself, as the Calvinist does. God tasted death, for every man.
Again, as I've revealed many times now, Jesus divested Himself of the knowledge of who He is, in His humanity, and submitted Himself solely to the Father's care. His experience was always one of living by faith in complete trust of what His Father was doing. As man's representative, Jesus obeyed to the point of death, and in His body, He experienced separation, yet never ceasing to be who He is, God in the flesh. His entire life, Jesus experienced uninterrupted communion with the Father, which He was always fully aware, and at the moment He took upon Himself the sins of all men, He experienced the loss of that communion, and He cried out "My God, My God, Why have you forsaken me?". Jesus never ceased being who He is, or as the ignorant claim "the God part left the man part", but the communion ceased, and Jesus experienced that loss. It's not complicated, but the idea that God was literally separated from God is foolishness.