It is the very title of the post in the 2nd link.

The post title says he locked the post, not that he banned anyone.

This one, however, advertises that it is welcoming as it desires to become larger.

It’s welcoming, but not to everyone. “No bigotry, hate speech, No zionists, No fascists”. Doesn’t say it’s limited only to activity on their server.

What you are missing is that additional people are being affected, beyond merely the instance admin and the people who wish to block that instance.

Every admin and every instance has their own rules and their own standard for who can participate in their communities. This admin has chosen the proactive route, but those who get locked out have plenty of other places to go, and they can even successfully appeal their ban. That’s the benefit of the fediverse, and I think it’s perfectly acceptable to preemptively ban people from your community if they display the kind of behavior you find unacceptable. It’s your party, and you can uninvite whoever you want.

I don’t have any problem with you sharing your take, but I haven’t seen anything here that I take issue with. You’re free to disagree but I like that server just fine.