The past chief center of nazism in the world (Germany) became one of the most anti-Nazi nations. That's evidence against the preposition that politics are significantly based on genetics as opposed to e.g. education.

Similar evidence may be the anti-monarchism of the Soviets when Russia was previously the most absolutist monarchy in Europe, the anti-communism of current Eastern Europeans, etc, etc

We can also mention how populations with the same ethnic base have becomes adherents of different political practices (e.g. South Korea vs Norther Korea)

On the whole I don't see genetics having more than a minor effect on people's politics, if any. It's certainly extremely overshadowed by factors of culture/education/etc.