I think he is speaking of CULTURALISM, not really racism. I am something of a culturalist myself.
Mellow out, Mon!
He has a right to his opinion I guess. Perhaps he had a bad experience. However, this was reality for my mother. We had a truly hostile neighbor until my father showed up at his doorstep one day. I do not know what he said to him but the same neighbor came and apologized to my mother and asked to ‘bury the hachet’ *LOL*
The thing is that races are a little bit different from each other. Our abilites, behaviors, and appearances differ slightly or greatly dependent on your point of view. These differences naturally drive us apart but human behavior can change and often does for the sake of lasting cultural peace. That road to peace can't always be peaceful because with any compromise, you give something up you value for something else. Change is painful and sometimes it is necessary and sometimes it is not.
I think racist feelings explains tribalism and the fact that throughout the majority of history most countries have been racially homogenous. The one thing we do have to watch out for is that when we artificially lift up one race above another (affirmative action) or constantly degrade and blame a race for other races' problems(like how the press constantly attacks whites).