"Black people have been very useful to America" is a very weird reason to respect the country.

Seriously, his reasons are:

-Played an integral part from the beginning (slavery was the beginning; I wonder if this person realizes what they're saying when they say that)

-Black millionaires, black president, and core aspects of American culture come from African American culture

-Black people have been very influential (and apparently this person thinks the most influential black people came from America)

-Black people have loved and died for the flag

So.......basically, "Black people have been very useful to America"