It doesn’t mean that reports are false just because two states are enemies (which is an exaggeration).

If they were strongly cited I would not be criticizing people believing them. All sources are biased, the question is how factual a source is.

The BBC is strongly biased against China. If they make claims without proof the most logical course of action is to not assume they are telling the truth and not incorporate what they say into your beliefs. (Note that this is different than "assume they are lying")