[valuearb]

"All relevant authorities on different sides of the conflict agree that this was sabotage"

So your entire argument is appeal to questionable authorities? What are their expertise with pipeline maintenance disasters?

How and why would an underwater demo team plant explosives 50 km apart? Why would they trigger explosions 17 hours apart?

If a hydrate plug is triggered to cause an explosion in one pipeline due to a specific temperature/pressure combination, how long would it take for a similar explosion to occur in another pipeline at the exact same temperature/pressure combination?