Definitions for "ideologue"
an adherent to or advocate of some ideology{3}.
an authority on an ideology
an extremist if his ideology is an extreme one
Individual with strong philosophical or ideological leanings. Generally unwilling to budge to compromise or work with others with differing views.
an absolutist -- someone who takes up a single position and excludes all other claims for consideration
Keywords:  trap, mind, otherwise, human, heart
an otherwise normal human with a mind like a have-a-heart trap