my grandmother still says 'everyone hates the jews!'.Except you only need one sample to prove a rule false, but you need to prove that there is no sample saying otherwise to prove a rule true. You only need to find one person who doesn't hate jews to prove her wrong, while you would need to check everyone on earth before proving her right.
If you want your proof, you find the one person who has records of these other vampires older than a century.
If I struggled to the end of my determination, to the end of my way of life with my followers, if the result is ruin, then this ruin is inevitable. Grieve. Shed tears. But you cannot regret.