Don't think you are far off at all.
Know them by what they do.
Evil exists. It exists as a genetic matter. It exists unnecessarily, as a matter of failure to teach a moral code to children that is capable of sustaining a free society.
But, good can fight evil if good wakes up.
Good far outnumbers the evil, sick, twisted, satanic, murderous, sociopathic and psychopathic blood thirsty child murders. White Rabbits who torture children, Satan and his followers who curse and mock the good, vampires, pedophiles have forced a number of good villages to burn them at the stake, hang them, try them.
They would prefer to rewrite our history, so that we believe the villagers were suffering from some sort of dillusion.
Funny how we all good, want so much to believe this, that we fall for "no such thing as evil or Satan" every time.