This thread by its definition is controversial and lends itself to subjective option and heated discussion, more than others. At what point does opinion become 'ideology' as every single comment can be described as such, who decides the thin line between ideology and opinion and worse cross it to label and dismiss a 'comment' in this context as an 'inflammatory ideological rant'? This is extremely subjective and dangerous territory.
Abuse, snark and insult do not lend themselves to subjectivity and are easily flagged. But in this case I think the comment makes a genuine attempt to engage, reason and articulate a point of view, and is not dismissive or abusive but veers slightly to the personal as did the original commentator. But still deserves to be heard and not hidden. The warnings about abuse or bad language is not subjective and hold.
But it would be unfortunate to want to hide away articulated and reasoned responses one may not agree with as that inevitably leads to an echo chamber bereft of diversity, pushing away diverse opinions, and in effect making discussion pointless. In my case, rightly or wrongly, it discouraged me from reading the rest of the thread, as it appears anything diverse will be flagged and leave behind a sterile and uninteresting discussion.
Perhaps Hacker News is not the right forum for this discussion. How does one discuss violence against people and sometimes entire populations for political or other ends with a distant and dispassionate tone without coming off as passive and unfeeling, unlike a more technical subject in which passion may be misplaced and derail discussion.