Does them working on the project voluntairly, makes them be able to steal code from non-opensource projects, ignore licenses and do other shit like that? If the answer is no, why does working on the project voluntairly lets them break the law in other ways?

there is a lot of difference between a random internet forum and an issues forum. also that particular issue was made with good faith even though both of them might have gone overboard. people suck a lot and might even make stupid arguments or issues. people stick to your work because they like it and they hope it will continue without dying next day, even though you do it voluntarily. this gives more weight here since their work is more like an internet forum where people voice out their thoughts. given such weight, i think they should have handled it properly, if they did it would not have been made a post or an article. i have no biased opinion for any party here, but since I respect lemmy a lot and doesn’t want lemmy to have a bad name, i think their developers should not give in and be unprofessional and give lemmy a bad reputation.