I didn't say they are merely speculating; that's a pretty normal thing to do. I said they are "latching on to this theory and making speculations to support it." In other words, they are starting with the conclusion, and making guesses to support that conclusion.

You incorrectly stated that's a tradition in archaeology, as if that would make any difference. It's not how theories are meant to be formed from evidence, regardless of whether or not you think it's a tradition in archaeology (which it isn't.)

The original commenter was explicit that they liked the theory, not that they were willing to make things up to support it. Those are two completely different things.