The CEO edited a comment and admitted he edited it, and it was stupid, and he shouldn't have done it.
I'm 100% sure there is a way for someone at any given platform they'd choose to replace it with to access a DB of posts and edit it without triggering any sort of edit marker.
I'm also sure if that process exists a CEO is someone who could probably make it happen, and in fact in some (most?) places someone lower in the chain of command can probably make it happen.
Spez's actions harm himself more than users of the site. By confirming what any technically minded person probably already knew (you can edit raw data backing something like a post), he gave the masses a new source of drama any time something they don't like appears on the site.
The sensible amongst us should be above childish drama like this.
What is there on /r/Golang that they expect to see edited?
If their qualm is political instead of practical then the users themselves should leave Reddit, and not burn down the entire village on their way out.