Yes, only white people are capable of being racist, because racism is power + prejudice.
I believe a majority white nation is capable of being antiracist.
When 10% of white women, white millennials, and white Gen Z flip antiracist, we will have a majority antiracist generation, elect and appoint antiracist public officials, and transform our society for the better of all, including the majority of white people.
Racism only serves the top 20% of income earners who control 86% of the wealth in our country. There are plenty of white people in the 80% who will be much healthier, happier, and wealthier when antiracist policies are enacted.
White people have nothing to fear in this transition and much to gain. Power is not a zero sum game, what we are seeking is to share power, and create a society that recognizes and honors the humanity in everyone, including white people.