In your own words if you were to describe what scum of the earth is you would say

People who abuse animals

Oh I say it'd be the two people, who when they had a daughter, from the moment they could, sexually abused her and recorded it to sell on the dark web. Yep they did that till she got free around 16 I think. I'd call that scum of the earth.

dirty algae that washes up on the shore

Hilary Clinton
people who kill children

Any kind of abuser ,but especially child abusers

war mongers for the money

Humanity as a group.

high ranking republican politicians

A bacterium called Homosapien.