Blood traitor

A blood traitor can be a person who feels more comfortably with 'lesser' blood groups.

Blood traitor types include...
 * Pure Bloods who marry Muggle Borns and Muggles.


 * Pure Bloods or Half Bloods not believing that muggleborns are vermin.


 * Witches and Wizards who have muggle or muggleborn friends

and many more.