This is the oldest excuse colonizers invented to justify their atrocities.
"We may have slaughtered and enslaved them, but we also 'civilized' them."
Even today, White people love to point out how much "better" things are for Black people in the US than they are for Black people in many parts of Africa.
Utterly ignoring the fact Africa is in the state it's in now because White people abducted huge chunks of the population, killed even bigger chunks of the population through conquest & famine and looted much of the natural resources.
"You should be grateful we didn't leave your forebears in the post-apocalyptic wasteland we created."
Like most things DeSantis has done, this will most likely be struck down by courts. But he doesn't care. His plan is to attract the hateful racist misogynist homophobe vote.