If we are going by the classical definition of oppression, that whites are cruelly and unjustly treated, I think that is fair to address that in some matters the oppression is clear cut. There are many places white people cannot walk without being threatened. There are many things that white people cannot say without severe backlash that other races can. Other races get favorable treatment in education and hiring over white people.
At the same time, however, others will point to the wealth of whites, their prevalence in politics, their education, and the fact that they are less likely to commit crimes and be arrested as evidence against oppression. And again, that is fair, to a degree. However, the only way to really get rid of that wealth, power, and other disparity is through oppression. Once those things are robbed of white people, the oppression will be crystal clear.