Earlier quoted context omitted.
Ooh, what a delightfully aristocratic objection. We can't give the lesser peoples self-rule, they'd rule themselves wrong!! Have you considered any noblesse oblige -style colonization and rule of third-world nations? Sounds like a good match.
That looks like the author is not saying "they'd rule themselves wrong", they're saying "they'd rule me against my wishes by voting conservative reactionary and ineffective laws into my life"
Postscript. You'd think a little geographic diversity and a federal system would let people let each other live in peace but instead we have national culture wars.