A very bad concept has seeped into a significant portion of the public's consciousness via the sewer known as academia. It is the idea that retaliation is a perfectly acceptable, permissible and justifiable way to treat people of certain groups (primarily white heterosexual males).
The concept forces a person to reason that since some people no longer living once mistreated some people also no longer living, that people from the latter group living today who were never mistreated are entitled to mistreat members of the former group living today who have never mistreated anyone.
This is the reasoning employed to defend discrimination against white heterosexual males today.