Mandarin does not want to do that. From all we've seen of the character the insanity and the villainy is that he wants to rule the world and it has never been 'to save the world' afaicr. It's because he deserves it. It's that he's usually unable to keep the cackling or the effects of the cackling to himself for long.

When did I say he wanted to save the world? I'm saying he might choose a legal way of attempting to rule/control/have great power over the world. Plenty of unscrupulous people find the best path to power is through political influence and not breaking the law. (Like the arc where Lex Luthor became president - and instead of exploring the implications of that, they had him put on a battlesuit. Sigh.)

Well, nationality and ethnicity are two different things. Jubilee is Chinese-American, but her ethnicity was written as a major part of her characterisation. Wolverine's Canadian. I wouldn't say his nationality is a major part of his characterisation.