I have never been able to figure out what in Laura Bush's childhood gave her those mexican traditions and her affinity to mexico. Did she have a mexican nanny? I don't know.
However, it seems to me that Laura is almost more pro-mexican than George.
I wonder if the girl that Laura killed when she was driving was a Mexican. That would make so much sense as to why both of them are so pro mexican culture. Obviously, guilt is something that does not go away.
I think you need to do some research and get your facts correct.
It was not a girl that Laura Bush hit and killed, it just so happened to be her boyfriend at the time who intered the intersection the same time as Laura who missed the stop sign. It was a very devastating time for her.