God and Karma

While skimming through dead beat as usual, i came across something which many bitter women have been stating, one stated it this way:

only GOD can judge people like you
KARMA IS A BAD BITCH…

The problem here is that she is stating that God will judge the man and at the same time Karma ( a supposed bitch) will revenge.So is God and Karma one or which is which.If karma is luck then they are denying their belief in God and trusting in Luck to take revenge, what a confused way of thinking.