Opacify

At its best, psychoanalysis is the classic therapeutic technique for exploring unconscious processes. At its less-than-best, it is a jargon-opacified, oedipus-complicated, libido-theoretical, pseudo-scientific cult whose messiah is Sigmund Freud.

They haven't, largely, because the debate has been deliberately opacified, with nationalist and Conservative politicians in particular still seeking to portray British Imperialism as a source of pride and Britain as the "good guy" in the slavery debate.