I'm not sure what you are trying to say? If a theory has too much evidence to dismiss it, how can it be a terrible idea? Are they terrible because they don't fit your ideology, or because of their implications about other people, or what is the issue?
Horrible in the moral sense. For example, that some people really want in their heart of hearts to kill entire other groups of people. Or that political or military leaders might willingly sacrifice hundreds of men, women and children to advance their goals. Horrible in the Machiavellian sense of pursuing power without moral constraint.
