Ummm can’t help but feel like your comment started off a little tone deaf? Yikes.
The ethos of the GP was obvious, not to mention that many plantations were not slave plantations, but rather sharecropper plantations (which is most likely what GP means). So even looking at the metaphor from a historical context, there's no "yikes" to be had. Maybe instead of polluting one of the few remaining decent communities on the internet, your time would be better spent reading a history book or two.
HN is one of the last communities where I can see someone post a contrarian opinion and have an actual discussion about that opinion instead of it vanishing from downvotes. I don't ever want HN to become like reddit, and in that context calling out reddit specifically makes sense.
The sad thing is HN is slowly trending towards being like reddit as the community grows. I see more and more instances of people using downvote as an 'I disagree' button or posting low-effort comments. To that end, yeah, I think the community should do what it can to call those behaviours out.