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Lemmy.ml is not the tankie instance. Lemmygrad is.
Lemmy.ml is simply run by a tankie, however that so far has not impacted the instance much.
As lemmy is currently growing faster than kbin, we would only be hurting ourselves on the ‘official’ instance. Instead better instance blocking on a per user basis just needs to be implemented.
I don’t believe it is about getting their userbase for the benefit of this instance but rather that defederating from a large amount of users not participating in any malicious activity on the basis of someone affiliated with that instance posting malicious works on another instance is (at least in my opinion) antithetical to the idea of the fediverse.
Doing so would step into the fallacy of collective punishment
I agree being able to filter/block everything from a domain on a per user basis would seem the reasonable middle ground.
Otherwise you’ll just end up with constant demands to defederate based on conflicting moral codes.
I don’t think growth should be the primary driver behind any instance, it should be about building and supporting the community on the instance.
Lastly I don’t think your argument is very persuasive, pick an idiology/group you feel are immoral (nazis, kkk, isis, etc…) and see if your own argument would convince you.