“Free speech” here means something specific: we don’t shadowban
Shadowbanning has nothing to do with speech. I'd recommend you reconsider your verbiage.
we won’t remove you for an unpopular opinion
Most instances already don't do that. Which leads me to believe you have unpopular (hateful) opinions and want to create a community where those opinions are welcomed.
Be a good human. It isn’t hard.
No, and yet many people fail to. And these are the types who will be attracted to your community.