No, not really. You have difficulty with understanding what people write and sorting things out, I'm afraid. Yes, one should not automatically assume that the behavior one displays at an early age is necessarily indicative of a person's outlook today. Some people mature. However, behavior at the age of seventeen, one would assume, would be more closely related to one's outlook at the age of twenty five, which is IIRC how old Arnold was at the time the film Pumping Iron was made and the alleged comments were made about Hitler. These anti Nazi actions do not square with the idea of Arnold as a Hitler lover.
Furthermore, everyone involved with the making of Pumping Iron denies the story about Hitler comments. I hope these facts don't ruin your Arnie hating day.