Every news organisation is a propaganda piece for someone. The bad ones, like the BBC, the New York Times, and Pravda make their propaganda blatantly obvious and easily falsifiable in a few years when no one cares.

The only way to deal with this is to get the propaganda from other propaganda rags with directly misaligned incentives and see which one makes more sense.

Unfortunately, LLMs are still quite bad at dealing with grounding text which contradicts itself.