Terran Purification League

The Terran Purification League was an organization extant in the 23rd and 24th centuries. 

One of its chief aims was the elimination of any non-Terran DNA from the human genome. The League looked upon the increasing number of Terran/non-Terran hybrids as abominations. The League grudgingly worked together with other Terranocentric organizations.

In 2298, the League engineered the death of Andreas Kitabatu al-'Qalb's wife, Laurena Cytrynbaum, and their unborn child. Fifteen years later, Kitabatu al-'Qalb would avenge their deaths. (Star Trek: Shadowstar Station: "A Separate War")