This needs to be read alongside the God Delusion for it's greatness. But, in the God Delusion, Dawkins, explains exactly why people like MTG never see themselves as the ones that need to change.
“The God of the Old Testament is arguably the most unpleasant character in all fiction: jealous and proud of it; a petty, unjust, unforgiving control-freak; a vindictive, bloodthirsty ethnic cleanser; a misogynistic, homophobic, racist, infanticidal, genocidal, filicidal, pestilential, megalomaniacal, sadomasochistic, capriciously malevolent bully.”- Richard Dawkins
Why should they see themselves as in the wrong in the eyes of a deity that seems to support their opinions? I mean, their opinions are completely in keeping with ancient social attitudes from several thousand years ago.