When you're talking to an open source dev, just remember that they are literally giving you their time for free, and they are people who don't like to be treated poorly.
Edit: Just to be clear, I don’t mean any ill will toward the guy. He’s frustrated and he’s just taking it out in the wrong venue at the wrong people, but that doesn’t mean he’s a bad person.
Edit 2: The reinstalling he’s talking about is NPM. So just running npm install. It’s because he tried removing the node_modules directory, which is a reasonable thing to do, but it means you need to reinstall the modules with that command.
But he is a bad person. He's being a fucking idiot and being insulting to the person who made the software for him in the first place.
People like that don't deserve patience and understanding. Perhaps a good response would be "this software is free for you to use, if you don't like it then fuck off and make your own".
These black and white statements won't do you or anyone else any good. We understand that an inconsiderate or rude act doesn't define a person when we can believe that about ourselves and love ourselves despite our many mistakes and cringe-worthy incidents.
When we love ourselves we begin to offer others the same grace and understanding we allow ourselves. We see the myriad reasons we don't think or act how we'd like to and realize that everyone else's life is just as difficult and confusing, and often for reasons we'll never see or understand.