It’s not a religious belief being expressed that’s at issue. People don’t want to hear specifics about your beliefs any more than they want to hear about your sex life, personal fetishes, or bowl movements.

I'm truly sorry that hearing a prayer is equal to hearing of someone's shit to you. When you hear it, please understand that it's merely a show of support by them. Their culture probably doesn't think it's unkempt for such a personal display to be made to another person.