There are many axes along which a community can be non-inclusive. I will always remember being made fun of in #gentoo for using Haskell. (Although I can not argue with the general guidance to install Gentoo.)

Once you see that worthy men can be made to feel unwelcome, merely due to their choice of programming language, it makes one wonder if other worthy people do not feel unwelcome when they are treated dismissively in some other way, as by by referring to every one as “men” indifferently.