Just read "Contempt Culture" -- https://blog.aurynn.com/2015/12/16-contempt-culture -- article. It is good to reflect on how you choose to interact with others within your field, programming or no, as this kind of gate-keeping happens all over the place. I know i have participated in it, and like to think i've grown out of it, but is important to reflect and be alert for this kind of behaviour.