If so explain
It depends on your definition of karma. I believe in cause and effect, which is what I think a lot of people mean when they talk about karma, but I don't believe in reincarnation or any sort of divine intervention.
Karma takes so long, Revenge (eye for an eye) is better and a sure thing.
Only idiots think karma is real.
You get back what you put out - you reap what you sow - measure for measure - so yeah, in that respect, I do.