A bomb like that would remove the entire top of the mountain. 300 feet down and hardened can only be destroyed from within.
My bet is on the Saudis with the clandestine assistance of the Israeli’s.
You might want to read some articles about the Massive Ordnance Penetrator (MOP). Some articles say that it can penetrate 200 feet underground before exploding. Others say that it can penetrate 200 feet of hardened concrete. Also these specs were from a while ago and it has recently been upgraded. Of course do we really know how deep this factory is or whether they have any air shafts? Also the true penetrating power of the bomb is probably classified.
My bet is on the Saudis with the clandestine assistance of the Israeli’s.
My bet is that since the article seems to have originated with WND, it is probably false.