I'll try to make it easy for you.
You can be a Cardassian. Does not automatically mean you were involved or even supported the occupation of Bajor. Still you are a Cardassian, so when Bajorans talk among themselves about how to deal with Cardassian oppression against them, you might not be needed or even welcome.
Simple, isn't it?
It is simple, you used the term oppressor and said that is who they want to exclude by excluding white people. That is racism, you can't support that and then say that all white people aren't oppressors. You cannot support them excluding white people because they're oppressors while admitting not all white people are oppressors.
O Flora, of the moon, of the dream. O Little ones, O fleeting will of the ancients. Let the hunter be safe. Let them find comfort. And let this dream, their captor, Foretell a pleasant awakening
No they are not.
Look, white people are the racial group that currently holds power in the West. That came to be through white supremacy.
White people, as a group, have the political, social, financial power to discriminate against other races, as a group. Other races do not have the power to do this in return.
All white people share in this privilege to one degree or another. Of course other factors exist. But the fact that white people are treated better in society in nearly all situations is undeniable.
Even if we do not actively partake, we still passively benefit from the oppression of other races. As such we are part of the oppressor class.
Yup. Same as gender, sexual orientation, gender identity, religion. etc. Class does not mean purely economic but also social.
Since this has pretty thoroughly devolved into discussing race rather than political protest movements, locking this here.