I think you and I are just not gonna see eye to eye on this.
The one additional thing I'll say is, the Nazis on Substack were absolutely undetectable to anyone who didn't choose to interact with them, but a bunch of people absolutely freaked out about them, to the point that it did a bunch of damage to a platform that was absolutely a positive force for good, just because people would have had to share the platform with literally about 0.05% Nazis somewhere out of sight.
Contrast with that, Lemmy clearly has some level of infestation of shills masquerading as real people with political opinions, and they impact the discourse every day. Some of them, if I had to guess, I would guess are actively funded by people who are actively in league with Nazis. You know the ones. Although, that's pure speculation on my part with basically nothing at all behind it beyond guessing. The impact to the discourse is the only part I'm confident about.
I haven't seen any level of freakout about that. Just an occasional bleat of "yo it's not cool that this is happening," and then business as usual.