"Lead into captivity, die in captivity. Kill with a sword, die by the sword. This is the patience of the saints" ----- Its God giving people what they deserve. I've witnessed it first hand. Evil people who suffered very ironic deaths.
You get what you give. Karma can be good and bad. Bad karma is when you do wrong towards people or things and in return bad things happen to you. Put simply, they are the same thing. It can be good and bad.