Angels attacked a friend of mine for more than 90 minutes, taking off and eating part of her legs, arms, breast and face. The paramedics that eventually brought her to the hospital were so traumatized they still have not returned to work. My friend has had 11 reconstructive surgeries so far.
Ah yes, dogs made to hunt and maim humans hurt your friend, so all dogs are bad as a consequence.
I'm truly sorry for what happened to your friend, but people are 100% responsible for their pets. Be not angry at the dogs, but the person that owned them.