A very simple answer:
PARENTAL FAILURE!
Exactly.
They kids know more about a reality show and default to the propaganda they have been brainwashed in the government school.
Think so?
These parents raised the kids with conservative values,a solid work ethic, belief in God, discussions of economic responsibility (including techniques), pretty much anything you would want.
The daughter turned out conservative, and is happy as can be to have just moved to a red state.
The son, who spent nine years as an Infantryman including two tours in Iraq, is a solid Obama voter.
I wish it was as cut and dried as you think.