Sorry, it isn't rude, it's just different. The culture is different and as an American I know and have seen just how rude we can be in a different country. In Disney they are just having fun. I have never encountered any chanting or singing anyplace other then outside an attraction or in the queue, never in the attraction itself. We are used to treating every thing like it's a church and cannot have any loud noises. We are the ones that need to lighten up a bit and start to find the enjoyment in things that are harmless.
