I'm confused.

This is hate speech isn't it?

Not that I agree it should be censored, but if you put the word 'savages' after any race of people, then that is the definition of racism. As the Merriam Webster dictionary defines it, racism is:

"...a belief that race is the primary determinant of human traits and capacities."

In the case of this document, the alleged trait is being 'savages' and the race that is said to universally possess this trait is the [American] 'Indian'.

If a modern document said "Japanese savages" or "Israeli savages" or "African American savages" or "Irish savages", would it not also be hate speech?

Aside from that, the people who wrote the Declaration of Independence contributed to the genocide of as many as 100 million 'Indian savages' in America.

Nazi Germany murdered 6 million Jews. I wonder if we would so gladly embrace the phrase "Jewish savages" in the current Constitution of the Federal Republic of Germany?

Facebook should not be censoring content. But I think it would be hard to argue that it has not correctly identified hate speech here.