sadist

Instead, Trump, like other demagogues and fascists, is a sadist.

On Wednesday, chief prosecutor Ute Lindemann described Brückner as a "dangerous, psychopathic sadist" and said he should be placed in preventive detention after serving his sentence.

A doctor later determined Gaff was a “sexual sadist,” with “increased risk of committing predatory acts of sexual violence.”

Fromm covers much of this ground again, analyzing Heinrich Himmler and Josef Stalin as case studies of the sadist driven by the need to dominate.

The sadist is not necessarily lethal; since his leading desire is for control, he will want to keep the victim alive.