How do you feel about people who make their religous stand really, really obvious, even it it's sure to offend, or even hurt other people?

At my husband’s family reunions they always hold hands and say a prayer before we eat. I’m an agnostic so it isn’t really important to me, but out of respect for the people who it is important to, I quietly participate. Also, there are always 1 or 2 folks who passed since the last reunion and most of the prayer revolves around them. There is often some quiet sniffling from family members closest to the deceased.

At the last reunion I happened to glance up, briefly, in the middle of the prayer, and there was some guy standing there, rigid, with his head up, and his eyes wide open, and this set, determined look on his face. He almost looked angry. I thought “You asshole. What point are you trying to make with such a blatant display of disrespect and rudeness?”

It would be different if he was just standing quietly, but he had to set up his body language in such away that it almost shouted out his disapproval.

What are people like that trying to prove?