Evil is not dark. If it were, people might be more prone to look at it. Evil is bright white and, because it hurts their eyes, they prefer to not look at it. Then there’s the other aspect of the matter. Once seen, it cannot be unseen and, having seen evil, otherwise good people of conscience have two choices: Either do something about it or ignore it and live with guilt of having done nothing. That was the gentiles of Germany in the ‘30s and, sadly, too many Americans today.
The worst of the lot out there today are would-be Quislings who are content to have their friends and neighbors eaten by the crocodile of a tyrannical, despotic state or alien cultural invader in hopes the croc will no longer be hungry when it gets to them. They are fools as that croc is always hungry!
A four line poem summarizes the process.
ALL MEN LOSE WHEN FREEDOM FAILS,
WHEN GOOD MEN ROT IN FILTHY JAILS.
AND THOSE WHO CRIED APPEASE, APPEASE,
ARE HANGED BY THOSE THEY SOUGHT TO PLEASE!
They do not think that deep. They are rather oblivious to the existence of the croc. It simply does not yet rise to a level of consciousness in their mind.
They don't see the larger picture. They don't realize that there is a much more extensive machine of which they are but a cog.