Why does Kazuma have Takeshi's picture of Kurumi and address Takeshi's mom as "mother". When Takeshi supposedly goes back in time, Kazuma is already there and so is Gekkou. Besides, Kazuma has a different set of parents. According to Washizu, Kazuma formed the Ghost Trailers because his parents were killed by Wizard Brace.
If the Ghost trailers want to stop the the oppression of magicians, and to have everybody be a magician, why don't they just cast spells on normal kids? Within a generation, everyody's a wizard. Done deal.