almost anyone who replies to a post that is from longer than a day ago on a busy subreddit, its because they read a call to arms somewhere (this time it was Jessie Singal who likely got paid by DontNod to try and run damage control on the whole nazi thing) and decided they want in on the argument.
But you cant argue with people on the the rebuttal post, everyone there agrees with you, so instead they decide to search for older posts and look for the perfect comment to reply to. Someone who looks involved in the topic.
Hello its me, your friend, the social media sarlacc pit, yes i will reply to you promptly, this is what you want, i will keep replying to you, we're now 6 replies deep, you want to stop now, we keep going, digestion takes a long time.