Restaurants are for eating.  The baby was eating.  Your argument is pointless.  Of course people don't piss or fornicate at the table,  that's what bathrooms are for.  Know what they aren't for?  Eating!  And that includes babies.  As for bottles,  many breastfed babies won't take a bottle,  some women are unable to get milk from pumping and it can be quite painful.  Given the young age of her infant,  it's quite possible the child won't take a bottle.  That doesn't mean the innocent baby should have to eat in a bathroom surrounded by fecal matter.  That's disgusting.