So this is not some grieving random person from crowd - Chas is a person whose libraries and contributions I value tremendously and he certainly made LOTS of contributions to clojure OSS landscape for free and out of his good will as well. So ultimately this feels like your parents are arguing (which is never a good thing) - you like them both and you just want the arguing to stop and you just want everybody to live together in harmony. But here you go, Chas has moved away from clojure now. And I have to say I am very sorry to see him go.
Seems to be an ego thing.
I'm not even mentioning the potential split in the community.
Also the person in question is also a well-received volunteer, which is why this is getting traction to begin with, which is why Rich Hickey would even take the time to tell someone that they aren't worth the time of the very response they're reading.