Is African American intellectuals a proper noun?

The term African American is a compound, proper noun, a word for a specific group of people. The plural noun, intellectuals is a common noun. The proper noun African American is a 'noun used as an adjective' to describe the common noun intellectuals.

Using a proper adjective or a proper noun to describe a common noun does not change the common noun into a proper noun; for example McDonald's fries, the noun fries is still a common noun; or for Shakespearean character, the noun character is still a common noun.