[kettleballroll]

As those comments say, any googler can verify that the mentioned email threads exist. And someone would've spoken up if that was a lie.

[karpierz]

And so someone did: https://old.reddit.com/r/MachineLearning/comments/k77sxz/d_t...

[andromeduck]

It honestly depends on how generously you want to read it, as a one off outburst or pattern of behavior.

The thread in question has been leaked in full IIRC. You can judge for yourself if you do some digging.