Well, the Soviet Union and Red China were bitter enemies too.
They are just two totalitarian liberals battling for control.
They were never really bitter enemies. That looks more and more like a ploy to suck in the USA and Nixon.
Bill Clinton only hates 0bama because he may have deprived Hillary of the Presidency. Think back to The War of the Roses in England where two branches of the same family fought for control of the monarchy.