If a mother knows she cannot "control" her 2 year old then she should not bring it to public places where there are alot of people. Nobody should have to put up with annoying children who don't behave. It's the mother's responsibility to watch her kids and if they are bothering others, she needs to remove them from the situation because not all people will have the patience to put up with a screaming brat.
Aperantly the man warned the woman several times to calm her child and she refused, so good for the old fart. Maybe the mother and the child will learn from this experience and next time the mother will keep the little shithead at home.
Sorry, no sympathy here...