The Inshingu faith isn't the most tolerant of heathens, but most people within Ryukyu lands don't care as most of the priestesses and nuns are absolute adorable/beautiful. Said priestesses and nuns also have enough training to go into the army and kick the ass of any one who attempts to break into their shrines. :3

In all seriousness though, Ryukyu isn't too tolerant and willing since they currently have religious turmoil due to older, native religions going extreme and fucking shite up. They see any new religion as adding napalm to the fire.