Would that mean that the Trinity I sreally more than just 3 entities? Would there be; The Father, SONS, and the Holy Ghost?
Larry Norman was a great songwriter. Not always the most coherent theologian. An even more likely theological objection would be to suggest that Christ died on the cross on this planet once and for all, terrestrials, extra-terrestrials or whatever. Especially if you factor in his title from Revelation: The Lamb who was sacrificed before the foundation of the world.