I couldn't give a shit who they want to thank, it's their prerogative, as long as someone's not ramming their culture or religion down my throat or trying to make me abide by theirs while refusing to act in kind towards my own, I couldn't really give a shit. It's his and their right.
Funny that atheists think it's their right to be what they want to be, but everyone else is just weird. If people want to believe or have a faith in something that they believe gets them through their day, then there's no harm in that. And of course I'm not saying there's no harm in religion or culture, but each to their own. There's dickheads in every walk of life, believers or non-believers, that's just life.