Haha glad to see you excited!
Well, it depends. I've never encountered a missionary aside from Jehovas witnesses and they're usually not that intrusive around here. In this story, I'm mostly drawing from the general positive indifference that's often shown towards preachers from larger religious/Christian communities. Tbh, my contact with religious people has been primarily positive so far - at least the ones offline.
Additionally, Christianity hasn't existed for a while in this universe, only the society of the enlightened have acted/disguised themselves as missionaries. Ofc they're trying to keep a positive image and low profile.