@pettter @dataKnightmare Free Software and everything GPL-related is one pain point. Anything non-GPL (BSD, Apache, MIT) is automatically labelled "the enemy" (from the GNU people).
Politics in hacker circles can be a hard topic, which can go from "you're a bloody capitalist" to "I don't care about politics, it's all shit anyway", and even having a discussion is risky.
What else? Many of the hacking communities I know are 90% white, male, heterosexual. Discussions about inclusion are labelled as "not related to hacking". Discussions about ethics are hard too...
Don't worry, making enemies at hackmeeting is a rite of passage. If you don't have any, you're doing something wrong 😅