>In the same way, forcing any website to list Gab would not be free speech...

I think you're being a bit disingenuous talking about "forcing" sites to list Gab. If individual instances wanted to de-link from it that was their perogative. But I was talking abuot sites which claim to provide indexes of what Mastodon servers are out there --ignoring the biggest one by a considerable margin, because they didn't like the politics of the people who used it.

I think if ypu're claiming to provide an index, it kind of behoves you to index everything you're supposed to be indexing. Not leave huge sections out because you don't like them. Imagine publishing a business directory where you didn't list the Jewish or black owned businesses... or printing a dictionary but leaving out all the words that began with a letter you didn't like.

Yes. No-one who believes in free speech should be "forcing" you to make good those omissions. But they're prefectly entitled to question the value of your 'publication' if you don't.