Mostly the shock and horror will pass. At least that is my experience.
Maybe put emphasis on the non initiation of force and peaceful co- existence. That no one in the whole world has anything to fear of you, except maybe some words they don't like.

I Don't know if it helps. I had some people who where afraid too, but now they are fine with me and look relaxed.

Good luck.
(Englisch is not my native language so excuse the mistakes.)