William Stryker chose to not to kill his son, Jason (who himself is partially modeled after Mastermind, another X-Men foe), at birth, His father sent him to Xavier's school in hopes of curing him, regarding mutation as a disease that must be cured. Xavier had no interest or belief in 'curing' mutants, which angered his father. Additionally, Jason continued to grow angry, resentful, and vindictive towards his parents; he tortured them by planting illusions in their brains until his mother committed suicide by drilling into her own brain in order to "bore the images out." his father then gave his son a lobotomy to make him more docile.