He has a point. A lot of even the most belligerent and extreme criticisms of America, with people saying the country doesn't have a right to exist, aren't really all that "wrong". I disagree vehemently with the concept of America not having a right to exist nowadays or Americans not having the right of self-determination, but European settlers settled and murdered Native Americans and built the infrastructure and society of modern day America using violent slavery. The only reason we have a right to be here is because of violence, murder, genocide, and slavery. We have a "right" because we killed and enslaved millions for it.
That fits well into the definition of "not that great".
This is just as simplistic of a take on relations with Native Americans in early America as the White washing that is slightly more prevalent. We didn't really have a "right" to be here as Europeans, but Native-European relations weren't a one-sided genocide as many of you seem to try to depict the situation.