The section of the population (and of Gransnet) that admired MT were pleased that a ceremonial funeral had been granted to MT.
By contrast, many people were outraged by the way in which the British establishment had joined ranks to lionize a woman that a significant proportion of the population felt had been a damaging and divisive figure in UK politics. The views of these people were totally disregarded.
On Gransnet, MT's admirers wanted only "positive" comments and any critical comments were treated as if they were an affront to human decency rather than as a legitimate expression of opinion. Subsequently, "The funeral thread - with no unkind comments" was started, which expressly discouraged anything but complimentary comments.
Comments on Gransnet relating to recent revelations in MT's official biography, etc., are now being portrayed by MT's admirers as being not worthy of discussion. The bigotry revealed in MT's letters to her sister are, I think, a totally legitimate and natural subject for discussion.