"little or no constructive content, directed at other people posting here."

Rather depends upon how you view the counter arguments that make nonsense of much of your dogma I suppose. If you wish to view counter argument as insult, feel free. I would suggest that you have had your own bullying way on all these threads for so long that counter argument is labelled condescension, sarcasm or insults, or a combination. This rather betrays how long you have had your own way here and have been the cause of so many departing. Of course all threads being dominated by the hard left do tend to drive the more rational away.
From looking at your behaviour who can blame them?

Now if you really want to look at a source of insults, invective and defamatory statement you need look no further than jimmie. One could fill entire books with them and there is no point in trying to deny it. The truth is there for all to see.

Meanwhile back to the thread. It seems some labour MPs still have an issue with their fearless leader. Labour MPs loudly remonstrated with Corbyn's spokesman outside a meeting in Parliament, accusing st jeremy of failing to stand up for his own MPs. What a pretty pickle. Even the staunch labour newspaper the daily Mirror gives the issue headline coverage. Another fine mess you have got us into Corbyn!