Why are these instances so different than 9/11? They were both carried out under the purpose of religious Jihad. 9/11 had over 2000 more killed, yet there was no end to anything. If you were a JW then you sure we're confident it was the beginning of the great tribulation.
You our have to remember according to JW prophecy predictions, even world war 3 isn't a fulfillment of anything. If the UN isn't given power to shut down religion, it has nothing to do with any bible prophecy. Not that I believe that is going to happen either, but you can't pick and choose what you want or think means the end. It has been clearly defined for decades.