Part of the problem here is that he suggested forking (he used the word "patching") the compiler in another project, and one of the core maintainers of Elm jump

Part of the problem here is that he suggested forking (he used the word "patching") the compiler in another project, and one of the core maintainers of Elm jumped into the issue and said it felt like an attack on Elm itself. That feels a bit silly - why make a project open source if you're going to get upset when someone forks it?