While users can be demanding, this reads like a very immature response. Going out of your way to block support and prohibit packaging, which you can let others do with 0 seconds of your time, is kinda rude.
Author may have been harassed for all I know, but this is still an emotional response. They could have just said "yeah I'm not supporting this at all, figure it out yourselves if you want to" rather than actively blocking Linux functionality/packaging, which is what this sounds like.