People of the different races are definitely different. Otherwise, why do people evolve to so different races? The white people may be better fit for higher latitudes, while the black people may tolerate more heat and sunshine.

In mentality, there may also be differences due to tens of thousands of years of different ways of gather food, even though those differences may be converged by education.

Denying existing differences is not leading to equality. Admit the reality and see if there's anything we can do to improve the situation.