The idea that all the culture white people have is centered on colonialism and genocide is utterly insane.
Well even though this is about S.Africa, in the US and to a similar extent here in the UK it's pretty true.
Not talking about individual European cultures, but the collective "white culture" his statement while crass is accurate. It's a designation I've recently had to learn myself when reading black people's concerns in their countries. I used to think "why can't white Americans celebrate being white, white pride" but after people explained to me the huge difference between black pride and culture and white pride and culture I really understood their grievances.
In context of the US or hell even S.Africa, what exactly is white pride? I'm not talking pride as a person of Dutch, Italian, Irish, German, etc origin, practicing culturally relevant to those countries from a historic note. I'm talking white as in the identity given to anyone and everyone of Euro descent who immigrated to these countries?
In the US black culture is the direct result of slavers stripping away the individual culture, language, spiritual belief, practices of the different tribes and countries. In the absence of having those, they formed a new culture based on their shared struggle of being dehumanized, enslaved, experimented on, yet overcoming and staying strong. They created new rituals and norms in place of the ones that they were forced to give up or were taken away. So by extension the collective "white culture" would be the wanton destruction and constant oppression of these previously mentioned group(s), the forcing of them to be one large group (scholars argue that has slavers let them keep their individual cultural identities, their modern day influence would be much weaker), the constant pilfering of their cultural contributions and claiming them as our own. The exclusion and targeted assault in their communities to better white communities, the constant disenfranchisement, etc.