Thing is though whites don't need a white pride movement as they've not been an opressed minority.
I'm sure there are some Zimbabweans who would disagree with you.
And while they may not need one, I don't think we should automatically assume that "white pride" people are racist. Then again, maybe that's just the egalitarian in me talking.
I'd wager that the person who wrote that comic was not, in fact, from Zimbabwe. Indeed, I'd even go as far as say they are most likely from a white-majority country, with decent odds on the US. "White pride", specifically in the United States and I suspect also in other white-majority countries, is mostly a slogan used by white supremacists, neo-nazis, and their ilk. Them, and people who think they are terribly clever by ignoring the historical context of the terms "black pride" and "white pride" and treating them as if in a cultural vacuum.
It's not a stretch to infer that a person repeating a phrase used disproportionately by racists is also racist.