The history of fraud is the key issue. When propaganda is planted in the press it usually takes quite a while to be exposed beyond doubt. When you see stuff in the press you can't always know for sure if it's true or false at the time. It's only later that the truth of the matter sometimes becomes clear. For example, the issue of the non-existent Iraqi WMD over which the invasion was staged wasn't really resolved for months after that invasion had succeeded. What we do know is that organisations like Benador, Freedom House, AIPAC and AEI all played clearly dishonest roles in creating, publishing and promoting the lies.
So it is imprudent to trust anything they say, given their history of telling lies.
If you find that a story originates with people who have such a history, then I recommend dismissing it out of hand. That doesn't guarantee that you haven't been exposed to other propaganda that passed this simple test, but it has some value, just like not trusting stuff you read at e.g. rense.com has value.