This notion that you hear from his surrogates and his fans throughout the campaign - "Trump tells it like it is; he's a straight shooter" - that through line comes in large part because this is a man who was welcomed into people's living rooms every week for nearly a decade.
Civilization is first of all a moral thing. Without truth, respect for duty, love of neighbor, and virtue, everything is destroyed. The morality of a society is alone the basis of civilization.