Rebecca seems to have quite a few problems with white people.
She apparently thinks that colonial imperialism and/or imperial colonialism was responsible for cooling the planet. Perhaps as a precursor to excuse a future genocide for the benefit of the imaginary climate crisis. Though Rebecca makes no mention of the indigenous people who tore hearts out of the torsos of living people in order to appease their gods. Did they affect the climate in any way? Only progressive brainiacs can tell us.
So was there a lot of colonial imperialism and/or imperial colonialism going on in the 1970s?
Now, some may argue that Rebecca was just talking about white racists and sexists. But remember, Rebecca is an SJW. That means her stories are very likely imaginary hate hoaxes, given the SJW proclivity to commit hate hoaxes all of the time.
Check out the story on the transracial cultural appropriator.