Maria and her family were not brought here in chains.
She was the descendant of the Conquistadors, one of the most vicious and rapacious groups to ever descend on the Americas.
She and her family were never slaves of the Anglo white people, but possibly were slaves of the Spaniard white people, if she was "Indio".
And she came here of her own volition because of the abject failure of the Conquistador culture.
But now Maria and her friends like to portray themselves as akin to the Africans. Poor, poor Conquistadors: they lost the war, but now they want the spoils. Like you said, the deed to the country.
And Marse Boosh thinks the country is "Mi Ranchito" as Somoza once said, and the deed is his to give away.