Yes but the war in heaven was fought over free agency (free will) so it dose not matter if he showed himself in earlier times to both the jews and the early native Americans.
i do not understand what you don't understand so i cannot address your question directly.
Little kids check under their beds for monsters.
Monsters check under their beds for Chuck Norris.
Chuck norris checks under his bed for Duke Nukem.
Duke Nukem checks under his bed for Gordon Freeman.
Gordon Freeman checks under his bed to check if his crowbar is still there.