I look at the question differently, Toddy
I see his treatment of Jews as the phenomena that lacks versimilitude and is somewhat unpredictable. That's why it is very interesting to examine Franco's motivation. His intransigence and ill treatment towards his own defeated countrymen did not change during or after the Civil War, he was predictable there. This dichotomy is what makes Franco an interesting historical figure. Perhaps as time passes, and those involved die and documents become accessible, historians will be able to uncover the answer to your questions.