There is a common debate on free speech in the US over of a platform should be punished for enforcing decorum on their users. Typically, it comes from the far right MAGA crowd griping when places kick them off for doing far right MAGA things, posting hateful content and persistently attacking anyone outside their bubble.
Hexbear is the tankie equivalent of something like 'truth social' or 'gab' who welcomes their type of extremists.
An individuals right to free speech does NOT meant an instance admin is compelled to amplify their message and help propagate it. This was argued over on every social media platform already and the only one to unban the extremists they banned in any quantity was after Elon took over Twitter.
Reap what you sow...