First one must admit that there is racism in Freemasonry. For many that is going to be hard. Racism in Freemasonry occurs in pockets around the country but rarely in a whole jurisdiction. While some local Lodges are barring Black African-Americans others are welcoming them. If you haven't witnessed racism in the Craft then you are apt to deny that it exists.
One measure of racial attitude is the recognition of Prince Hall by American Grand Lodges.