I recently found an essay (?) about "contempt culture" in the technological world:
I realize that I am 100% guilty of having a bad attitude towards those who use software that I consider inferior. - Like the author I hadn't thought about the social consequences.
I'm still an advocate for software freedom. It's good to encourage others to choose libre software. I'll just have to check myself and make sure to not be contemptuous of others software choices.
As a start on my path of technological inclusion I promise to never again make fun of Java programmers, KDE libraries, or Windows users...