I understand bad smells and high pitched noises. I can't be in the house when someone cleans the bathroom and I can't stand indoor swimming pools or anywhere in the entire building that houses the swimming pool because the smell of bleach and chlorine (among others) burns my sinuses like wasabi.
My most hated high-pitched noise is the sound of a screaming baby/child. It makes my brain HURT.
I'm odd in that I don't find religious or spirituality irritating, and I'm religious myself. But how other people express their religiousness/spirituality and try to get into other people's spiritual business irritates the hell out of me.