So just to add some factual context here. Your Dad fought actual nazis. The people we call nazis are not actually (nor will they be) that powerful. The world thanks men like your father for their success.
The losers we call nazis today also go by many names, christians, christian nationalists, evangelicals, KKK, racists, bigots, white supremacists, dictators, etc. But the one name that actually describes who and what they are is Fascists.