Fleetwood, in many fairytales, if the king and queen don't invite the Wicked Witch to the birth celebration of their baby, then she arrives anyway and puts a curse on the little one! Meaning that we all have toxic elements in us to some degree. If we don't deal with them in a healthy way, then they show up in our life as allegedly toxic people, etc.
First you call people toxic. Next thing you know, you're burning them at the stake or leading them into the gas oven!