If by Karma you mean what goes around comes around, all you have to do is look at people like Saddam Hussein, Ben Laden and Moammar Gadhafi. They lived by "the sword" and died by "the sword." However if by Karma you mean reincarnation, I honestly don't know. I did notice that when the Pharisees sent some people to ask John the Baptist who he was, they were recycling some of the names of great Prophets from the Old Testament. Does it mean that they believed in reincarnation? And if so why would holy men such as the Prophets want to reincarnate? Another thing I noticed in the Gospels is that Jesus Himself said that John the Baptist was Elajiah, but then Elijiah appeared to Him during the Transfiguration, along with Moses, so surely He must have meant something else by that. One needs to know how people thought during the times of Jesus, as well the manner in which they communicated with each other. I know a lot always gets lost in translation. I personally am open to the possibility that some people may be given the choice to come back and try again. After all to God all is possible. I just hope I don't get to be one of them.