He's not banning people from thanking god or acknowledging the importance of god in their lives, he's banning the preaching of your religious beliefs to the crowd, telling people that they must also find Jesus or whatever imaginary man you believe it.

You can say "I wanna thank god for this win, without him nothing would be possible" ect. Dana just doesn't want guys preaching a sermon to the crowd, "you have to find god, blah blah blah".

It's not an unreasonable request.