years ago when I was more ignorant I tried an aikido dojo briefly, and I didn't like the bowing to the shrine so I kind of traded some sarcastic remarks with the owners (they weren't the friendliest people anyway) , and was told not to come back... But now I would have no problem bowing to whatever, and I do in the martial art I practice now. (not aikido). I am also spiritual ,& non-religious. and alot more open-minded. Anyway, I think it's more a lack of understanding eastern traditions.