Oppressors or Suppressors demean, victimize and/or demoralize groups of people or even entire societies. This is usually done by Tyrants, but may be achieved by anyone from Control Freaks, to Disciplinarians, to Socio-Political Movements.

In general Oppressors will be more concerned with keeping victims in line as opposed to outright harming them although they will not hesitate to kill anyone against them.

However, just because a villain is Oppressive does not always automatically make them Xenophobic/Misogynistic/Misandristic/Homophobic.