He and Howard Stern have done the same turnaround. They're now weak and sensitive and trying to please the left. Maybe it's an age thing.
Stern got accepted into the elites, and has a wife 20+ years his younger. He's got to keep her happy with the exclusive parties, etc.... He's also protecting his money, his team was very good at spotting when the "Me too", and other cancel culture things were starting to take hold, so he started to tout the line that he was reformed. His kids have their own skeletons too. The oldest is super religious and had a rough relationship with him. The second is fine, a suburban nurse, and the 3rd had a rep as a party girl. Can't poke fun at people when they can poke back.

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Arnold is courting power. He tried to win over Republicans, and had some success, but not enough that they'd change our laws, and let him run for President, so he hates them now. Also, he and Trump are contemporaries, but Trump has bested him, so there's resentment there too.