The comment you replied to wasn't good, but taking HN even further from its intended use just makes the thread worse, which is why the site guidelines ask you not to do:
The purpose of HN is to discuss topics from a hacker perspective is it not? Which typically has implied characteristics of rationally discussing topics in an honest and forthright manner, no?
Would you consider the calling out of similar dishonest talking points in support of flat Earth theories to be in violation of "idealogical" battle rules.
The purpose of Hacker News is intellectual curiosity, not smiting enemies. I don't need to agree with Nazis or disagree with you to point that out, and you don't need to break the site rules to correct errors or just flag egregious comments. If you like political kung fu fighting, there are other places to do it.
Democracy means giving everyone a chance, even those nazis that nobody likes. You can't say you're tolerant and at the same time be intolerant towards that specific group because history condemns them. You've got to be better than that on principle. If you claim that rationality should prevail, then engage them on those terms rather than banning them outright.
I don't associate with flat Earth theorists because I've convinced myself those are false based on my current knowledge of physics. For me, that matter is pretty much settled. However, the people from /pol/ sometimes cite published scientific articles I'd never seen before in order to substantiate their claims. While I take their politicized posts with extra grains of salt, I do check their references and try to form my own opinion on the matter. Many times I end up no wiser than before, sometimes I reach different conclusions. The point is: if people had simply banned their discourse outright, I wouldn't have reached any conclusion at all.
I simply don't want anyone else drawing conclusions for me.