I’ve never seen any evidence that adults aren’t also manipulated by media. I would also add that claiming someone isn’t mentally strong enough to vote by themselves without being subject to others was also used as an argument against both women and black people not being allowed to vote.
Well the biggest contributing factor would probably the fact that Judea was a hotbed of insurrection and Revolt at the time. That he himself was a feature of that setting. Within his lifetime his homeland would have been at war with Rome. So I doubt he lives to old age.