Honestly you sound really naive. You seem to be under this delusion that people who hold intolerant ideas are only doing so out of honest ignorance and they can simply be convinced otherwise. Have you ever interacted with an anti-vaxxer? A covid-denier? A religious fanatic? A slavery apologist? The world is absolutely filled to the brim with incredibly unreasonable people who will ignore all evidence for things that don’t fit their world view. They aren’t looking to be convinced otherwise.

How do you plan on “respectfully asking” a homophobe to stop hating gay people, for instance? What if they just want to post about how much they wish gay people would die, what argument do you think would sway someone dedicated to their religion? Since its just speech and not action, they should be free to hate as much as they want according to you.

Your whole point doesn’t make any sense either, the idea that people would jump ship to make threads accounts if they were defederated is absurd. The fediverse is an incredibly niche corner of social media, the only reason you would specifically search out for communities here is if you were disatisfied with corporate social media (like threads) to begin with.