The author selected that quote, like all the rest, to make a point. It's little slip ups like that that let you judge someone's biases in an objective way. No fair reporter would imply Osama Bin Laden was ever 1. unarmed 2. elderly 3. a civilian. It's a deeply wrong and misleading quote, intended to bias the reader in favor of the author's narrative. If these guys would order a hit on a a little old innocent grandpa, what wouldn't they do?

The article's theory is built on a house of cards, like a most conspiracy theories, but that doesn't mean it's not true.