Characteristics of white supremacy culture

This isn't new, but I just found it. Leftists commonly say that race isn't real, and is just a social construct. They might say that Whites have no culture, but sometimes they explicitly reject White culture. If it is not about skin color, what is it about?

This summarizes gripes about White culture:

Below is a list of characteristics of white supremacy culture which show up in our organizations. Culture is powerful precisely because it is so present and at the same time so very difficult to name or identify. The characteristics listed below are damaging because they are used as norms and standards without being pro-actively named or chosen by the group. They are damaging because they promote white supremacy thinking. They are damaging to both people of color and to white people.

These are complaints about modern civilization. I think that it would be great to have an open debate about the merits of White culture, without mentioning skin color.