These two parents wouldn't calm their screaming abby so I called them out.
Were they upset when you called them out?
The father told me he was not interested in my singing while the mother said I ruined their night out.
Its not a great idea to call out parents for their baby's behavior. If a baby is crying they without a doubt know, so telling them to do something about it is only going to make them more upset. Caring for a baby is tough enough as it is.
I know, but I wanted to protect their baby and my hearing. If they want to hear screaming they should make sure they do it at home.
While it was rude of them to not calm their child, you could have spoken with them about it in a nice manner. Calling people out is a pretty annoying thing and they wouldn't have appreciated it.