I don't understand what "family values" means - "It's how you live" said Jerry, and in a way that feels right. But in that case everything anybody does is an expression of "family values".

The expression always sounds like Mafia language to me. The code by which each family lives, and loyalty to that code and that family. What else does it mean?

I think love your neighbours, and love your enemy - often enough the same people of course - is a pretty good line to follow. Your family are just the neighbours and enemies you are equipped with to start with, and liable to be tied up with for life one way and another.