You are of course right, albeit it has to be said that for the majority of us, we tend to be 'driven by ideology' so long as that ideology is working for us. RedTelephone asks in another thread
All the SS Generals surrendered rather than die.
And very quickly ditched the Nazi ideology ( at least in public) to adapt to the new American ways.
What a shabby lot.
Of course they weren't outstandingly shabby, they were just normal humans, behaving like normal humans do. There were of course exceptions at the fringes - like the wounded German officer taken in the Cassino battles who preferred death to a life-saving transfusion because the medics couldn't guarantee the transfusion did not contain 'Jewish' blood. But that is the point - the latter are the exceptions and probably, ironically, shared many if not all personality traits with those few Germans who opposed Hitler during the 3rd Reich.
As for then 'Republican' thing - of course you are right. The point is that the whole bunkum is a classic, beautifully self-fulfilling and conveniently vague and subjective prophecy which thus can be applied to pretty much anyone. That is because it is a selection of descriptors of the universal human condition dressed up in suitably pejorative language to make it sound 'fascist'. It has as much validity as the average horoscope. I mean: 'obsessed with sex and violence'? Who isn't? Of course you could call it 'having a healthy interest in romance and the plight of the victims of violence' but that wouldn't sound terribly 'Fascist', now would it? Prospective trial with neutral language anyone?
The fact that it was initially called a 'Fascist' personality, rather starkly reveals the bias of the original proponents of this idea, if the pejorative biased language didn't reveal that enough. In short it it is a tool for making all evidence fit the theory as opposed to finding out whether the evidence supports the theory.