When I think about it, is it any different from no longer supporting charities that might try to start mutilating children in Africa with donations? There are charities I don't think I would be giving money too because they intend to direct the money to circumcision. Is that being petty?
I understand how people feel this is directed at the child but I am not sure I can call it petty. I might consider the parents of the child selfish since they wasted what little money they had on something the child didn't need. Something that perhaps the father wanted done to the child so that he looked like him.
I can see this from both perspectives but at the end of the day I think I would come down on the side of the OP.