it be that there's a disgusting 'White Gene' that kicks in every once in awhile due to "epigenetics"? Read that entire Wikipedia summary...James Byrd just needed a ride home...he did absolutely nothing wrong...his mother was a Sunday School teacher and his father was a church Deacon...James was a husband and father to three children, and worked as a vacuum salesman.
Note also the subsequent racial responses from 'White Supremacists' across the country in support of the killers...your constant bias here isn't helping.
Please stop with the 'Genetics' trope...and as for arming every Tom, Dick and Harry...you're asking for legalized mayhem...and you know it...quit acting like a simpleton.
Link: https://en.wikipedia.org/wiki/Murder_of_James_Byrd_Jr.