I was watching a program on the early career of Hitler the other night on the History or Military channel. Historians have never been able to definitively pinpoint when Hitler began to hate Jews. One suggestion was that he merely saw that Jew hatred and his identification with it stood him in good stead in Munich where anti-Jew sentiment was high. He may have simply adopted Jew hatred as a means to political popularity.
I don't think James Carville has any core beliefs, either. I think that is why he and Mary Matalin stay together. The two of them know he is paid well to be a hired gun for the left, so they take the money and run.
Nor does Matalin have any core beliefs. Otherwise she could never tolerate Carville. They have "professional" admiration for one another.
Back in Classical Greece, the sophists would use their great skills in rhetoric to sway a crowd to one side of an argument, then they would use those skills to convince the crowd that, in fact, the reverse position was actually true.
This has always been the mark of a great debater -- can you win both sides of the argument simultaneously? It takes real skill, and the people in the business see the skill and respect the skill.
Those of us in the real world who are looking for character and principles are going to end up disappointed. Our politicians are now figure-heads, advised by sophists. It's not good.