You'd have to finesse the definition of anti-colonial, but I'd argue this could come out of Italian/Spainish/Latin American Fascism as trying to get rid of colonies not throwing independence, but "uplifting" the natives via Roman-style seeding of settlement and integration the people culturally, economically,and administratively into the Metropole (With, of course, a good deal of resettling your own people and crossbreeding with the native ladies). The Mestizo identity was a useful historical precident for that historically, and it could easily fit in as "Our Culture is great, we have a manifest destiny to give the poor tribals a chance to embrace it. Just look at Christianity; Jesus came to create an organization and new covinent that would bring salvation to all who listened and wholeheartedly embraced his teachings,rather than simply giving it to a "chosen people" like those Jews and crazy Germans seem to think. Don't you agree America? Britain?"