I don’t know how to interpret “everyone should feel welcome here” other than it is for everyone. As far as culture shift, it really is impossible to maintain the more “fringe” leftist culture with an increase in users, marxist-leninist simply do not exist in large enough numbers. I don’t really see why lemmy.ml shifting its majority political leaning would be something negative to you, since the only thing that would happen would be more discussion in the comments, and if discussion isn’t something desirable, places like lemmygrad do exist