Kolektiva is a big ass pot of open abuse and that's a pass and a block.
If your instance has open registrations and a poor moderation policy, it's a bad server in the community, no matter how much you are attached to it.
Calling for your instance to be ostracized is not a judgment on every single person on it but if you can't understand that, you deserve to sink with it. Even more so if you incite abuse against people calling your instance out.