So in your opinion we can never improve because when we try to improve ourselves to not be prejudice, the more prejudice we become? So what is the use of trying? We might as well admit that we all harbor prejudices and just live with them.

That is like saying that since as a Christian I know that I am a sinner, therefore since I can not live above being a sinner, I might as well act like a sinner and not try to be a better Christian. Is that the idea?