There are two types of theories, and perhaps Sab is working with the second.
1. a coherent group of tested general propositions, commonly regarded as correct, that can be used as principles of explanation and prediction for a class of phenomena: Einstein's theory of relativity. Synonyms: principle, law, doctrine. 2. a proposed explanation whose status is still conjectural and subject to experimentation, in contrast to well established propositions that are regarded as reporting matters of actual fact. Synonyms: idea, notion hypothesis, postulate. Antonyms: practice, verification, corroboration, substantiation.
Maybe that helps a bit?
To the idea of fighting against truth being evil... this fighting could simply be ignorance, and we are all guilty of that in some shape or form. Someone would have to know the truth, and fight against it and those who abide by it, in order to perhaps be considered evil.
Peace,
tammy