I've seen that post as well, and often wondered if it was fair characterization of overall Julia community (maybe it is), or is the result of a single bad apple at the top that overshadowed an otherwise pleasant community.

Unfortunately, it doesn't take much negative energy to spoil a community, even if it comes from just one person. That it was a language co-creator is troubling but not necessarily a reason to avoid the language if the rest of the community is nice (which maybe it is, maybe it isn't).

However one thing I have noticed is that most language communities do tend to follow an attitude set by the language creator(s). This seems to have played out quite a bit for Clojure, Python, Elm, Elixir, and other languages where, at least to me, the overall shared perspective of the community is closely aligned to the personal attitudes and opinions of the language author(s).