Fascist ideas don’t spread because they make good points. They spread because they get repeated so much. People who don’t know any better believe it because they’ve heard it so many times, or from someone they trust. Federating with fascists gives them more people to spread their ideas to.

Talking to conservatives can definitely help, but it really depends on the context. Just having people who they disagree with in their lives can can be helpful. If you’re someone they trust you might get them to work through some things. Or if you know a topic really well and know what talking points they’re likely to bring up. But it’s nearly impossible to get though to people who already hate you.

Everyone is at a different place with what they want to handle. Some people just want a small friendly community where they have a chance to relax. Others want a more open communities that only keep out the worst. And some are okay with putting up with harassment to reach more people. But generally we shouldn’t force others to put up with that harassment along with us.

I generally prefer to federate with as many communities as possible, but federating with fascists is a terrible idea. You’re just making people in your community vulnerable to harassment.

People are self organizing onto these instances, and if they don’t like their current one it’s not hard to move. Most people won’t move to one that allows nazis in.