Reg, I've learned my lesson on this site, I hope you do so too.  The moment you point out person of ethnicity A attacked/killed/hurt/etc. person of ethnicity B, you'll immediately be greeted with examples of ethnicity person B attacked/killed/hurt/ ethnicity person A.  Whenever that's not available, they use B -hurt-> C (a third ethnicity) - as in poster #2's reply.

The idea is to show you that your bias (whatever it may be) against other groups is unfounded and irrational because others may have similar unfounded and irrational biases against your kind. 

Put differently, you're arguing with a wall made of rusted iron, small poultry and other mixtures of low-grade cement. 

"Not me. I'm going viking style with all my meagre possessions and savings put around my body in a boat then torched. I figure the residual alcohol content will mean fireball on ignition." - the great Minister of Love