Apparently the censors don’t like when I write sad truths about r. schach and r. kotler but they don’t mind if anyone makes fun of lubavitch or the lubavitcher rebbe so I’ll try this 1 last time
As anyusername already explained most of it so I’ll try to summarize
The rebbe never responded to personal insults from anyone he only responded to the insults that affected large groups of Jews for example the irreligious on the kibbutzim that r. shach called non Jews or in the case of the previous lubavitcher rebbe r. Kotler refusing to give food to the lubavitcher bachurim in Shanghai since he didn’t consider them bnai Torah and causing 2 of the bachurim to die of hunger for lack of food
As a side point halacha says הרב שמחל על כבודו כבודו מחול it also says (sorry I don’t remember the exact Hebrew phrase) that a talmid can’t be מוחל on his teachers behalf so even though the rebbe will never respond to the personal insults, the chassidim will so if you call the rebbe “the man sitting in Brooklyn and driving the whole world crazy” or after his stroke you say that you’ll say tehhilim that he has a refuah shleima physically and mentally (implying that you think he’s mentally ill) don’t get surprised when chassidim start hating you and making up things about you like saying (to use anyusernames example) that you’re mibnei banav shel Haman limdu torah bebnei brak.