No. Except under conditions of extremity, when people like Stanley Milgram found the majority of people would act against their own consciences in service to a perceived authority, most people have some honour.
I've met some terrible people, but only a handful were like this OP claims to be: They were psychopaths. They're rare even among monsters, and they honestly can't seem to understand that, yes, other people really do have motives and emotions they lack. They're scary in part because, to them, "other people" lack depth, like characters in a play put on just for them.