How to respond to missionising people? By handing them a business card not with your own name, address and telephone number, but a link to this video:
I leave people believing their stuff alone as long as they do not try to actively engage me or try to change the social environment I live in or think they must endlessly demonstrate themselves and their pretended superiority to everybody around. Freedom of religion always implies also: freedom
from religion. Keep thy faith to where it belongs: inside your cabin, then all is good and no fight is needed.
Die Gedanken sind frei. But the others have no obligation to be interested in them - they have the freedom not to be so.