My understanding is that if you create a post and you post it to a community, then the mods of that community can mute your post and that post will show muted everywhere, even if it is reblogged.

Your best bet is to simply copy the content from that post and re-post it (like a brand new post) to either "no-community" or to another (more welcoming) community, like "freespeech" or "logiczombie".