I said "If the evidence doesn't give a clear answer by itself, then those parties [with most to gain] are where i would direct my attention".
I'm glad you found humor in this thread since I did as well as you smugly dismissed some of the most basic tenants of criminology (Motive, means, and opportunity) because you think that might bring unwanted scrutiny upon the regime that you support with unbounded zealotry.
If evidence answers the question - awesome.
When evidence fails, motive (those with something significant to gain) helps to assemble a list of suspects while means and opportunity help to narrow that list down.
Amazing how you are willing to focus carefully on the minutest of details when it comes to someone you oppose, but will not follow even basic logic when it involves your own kin.
Now, again Chris, so you are crystal clear on this, I didn't say that the Saudis or anyone else did this. In fact, i would put them near the bottom of likely possibilities, but I wouldn't dismiss anyone who could gain from this if we don't get a clear answer from the evidence.