My wife says those on the left tend to hate themselves so they tend to accept negatives.
Thomas Jefferson said something of the sort that 'the two types of people are those that trust their fellow citizens and those that do not.'
I don't think Jefferson is that far off but I think my wife is more accurate but I am not sure.
http://www.amazon.com/Conflict-Visions-Ideological-Political-Struggles/dp/0465081428
Read this, you’ll have a far better understanding of the situation than you do today.
(Jefferson was closer to accurate, but your wife has a facet of it)