Of course the community is friendly: all dissent is ruthlessly crushed and removed. It feels very friendly and nice until you start to dissent, then it turns on you hard.
I posted an article saying I now recommended elm and was a part of the reason we chose it for our product. But I also said some things I disliked about elm.
So I was banned.
No warning.
Banned from where the discourse?
My actual experience has been exactly the opposite: I've interacted with many members of the community (at multiple Elm conferences, in the Slack, and even twice met members of the community for in-person meetings when they were visiting near my office). All of these interactions have been the entirely opposite of "unfriendly".