1,000%. Deconstructing propaganda necessarily pushes you into revisiting history, even going so far as to imagine sympathizing with the "opposition". Without this perspective, you are trapped in a given mindset and are unable to adequately "fine-tune" your understanding of what *actually came before you. Read. Read. Read. Read. Read. Read. Assume everyone is lying and noone is lying simultaneously, then use your own heightened sense of judgement and intuition to better understand past situations (for which you never will actually arrive at perfect knowledge, alas, we are imperfect, blind humans searching for elephants in the dark.)