White people might not suffer from racism where you are but thats not to say they never suffer from racism. Racism exists against all races and all over the world. We shouldn't be focusing on the race of the victims or even the perpetrators we should be focusing on stopping it period.
Good point, I've added a note to point out the context as referring to the United States.
EDIT: I would point out that some groups suffer much more from racism than others, so we should be aware of that reality in dealing with racism. To that end, whites in the United States are largely unaffected by racist attitudes.