Feel free to show me where Reagan Man has said Arnold isn't "righteous or worthy". Arnold is, by his own words, a social liberal. In many respects, a convention is a referendum on where the party's headed; if the GOP chooses to give one of its most liberal members a primetime slot it'll be making a profound statement on the direction of the party.
I would submit the party would do better to showcase a conservative star in primetime.
Guiliani is more "liberal" than Arnold, and I'm sure he'll have an even more prime spot. Maybe he should be barred from attending instead?