A greater part of the problem is the average person is prone to cognitive dissonance, they unconsciously cherry pick what they want to see about their chosen politics, religion, ideology and when challenged with unpleasant realities openly say "Yes maybe so but I personally don't believe in that part" and then follow it up with some asinine platitude of an excuse such as "You can't make an omelet without breaking some eggs"
My own father for instance who can when the mood suits him be very helpful, generous and caring, has voted Tory all his life base on two pieces of advice.

1. If it was good enough for Churchill it is good enough for me
   and
2. Always vote for the people who understand money

When I pointed out to him recently that Churchill would deplore what the British right wing has become and actually fought WW1 and WW2 against comparable Nazi policies that the modern Conservative party embrace, his only recourse was to claim ignorance of modern Tory policy.
On the second point when I assured him that the Tory party do indeed understand money, because they know how to get it off everyone else and not give it back, while all the while lining their own pockets, he demanded to know why, if I was aware of that, had I not gone in to politics and joined the young conservatives in stead of the LPYS.

There is an old saying that the best trick the devil ever pulled was in convincing people he did not exist, the political right do the same thing in convincing the electorate that there is no such thing as a bent politician, and that all politicos do it for the common good (unless they are the loony left of course).