I don't see anything in this chat log that changes anything.
So, again, referencing the tweets & subjects preceding their announcement as context aren't unreasonable as Golden says there's more context on Twitter. Emily Rose, notably, unleashed a series of tweets at them until they capitulated. It's still not the official word you're seeking, but to ignore it seems willfully dismissive.
Moreover, in what manner would a direct affirmation or counterpoint by the Nodevember organizers be advantageous to them? I'm not trying to be conspiratorial about it; being quiet and vague is the far more diplomatic path. It's not in Nodevember's interests to be precise with the particularities of the disinvitation, nor are we, as outsiders, owed any sort of particular explaination. But neither were any details provided to Crockford for him to ameliorate. "It is a mystery to me too." per https://paulstraw.svbtle.com/crockford