Don't think of it as a community being political. It's not like people pick a programming language and then suddenly one day decide to be political, in part due to their programming-language choices.

Think of it instead as "people who are political" looking for a community (not necessarily because of that community's politics, but often for orthogonal reasons, e.g. a language being relatively new and so not yet used by anything they dislike) and then those people being political about their programming wherever they land. If some percentage of programmers are like that, then just statistically, some language is going to end up with a lot of them, whether its maintainers wish to cultivate the community image as being such or not.