They practice sadism
sadism /ˈseɪdɪz(ə)m/nounthe tendency to derive pleasure, especially sexual gratification, from inflicting pain, suffering, or humiliation on others.“beneath the apparent loving concern she had glimpsed spite and sadism” From wiki: Sadist refers to: A person with sadistic personality disorder, an obsolete term for individuals who derive pleasure from the suffering of others Sadistic personality disorder was a proposed…