I don't want to hold hands and thank God.
What's wrong with doing that?
I think the ceremony is very boring.
It is okay not to like all religious ceremonies.  But, it is still important to be respoectful.
I'm going to disrespect the hell out of the wedding.
You do not have to think the ceremony is not boring. But being disrespectful on purpose is wrong to do. Just do the ceremony without any problems and it will be over.