In theory yeah I agree. But to answer the question "why divide"... I'm not dividing so much as talking to a specific audience. I'm not going to waste my time telling left wingers that they should be "committed to truth" because they're actively committed to lies on purpose.  Therefore, waste of my time. What I see on my side is more well meaning people who just trust and spread information without consideration of the possibility that it might not be factual. One side really does want to be truthful, the other side could care less. I'm talking to the people with good intentions and not so good practices.  By definition, that excludes left wingers.