I expect that JWs will continue to grow, but not for the reasons you have stated. That average JW that pays very little attention to world events and understands them even less. Whenever I try to discuss with them the most remedial socio-geo-political events, all I get is a glazed look.
I disagree with your conclusion that possible nuclear capabilities, not oil, is the root cause of the war; I suggest you read "American Theocracy." It was recommended to my daughter by her boss in D.C., and she then recommended it to me. It is a very detailed book, but it is well worth the time spent.
Iraq is hardly the first "resource" war, nor will it be the last. In fact, Mr. Phillips (and others such as James A. Paul of the UN-based Global Policy Forum, Williams Engdahl and Stephen Pelletiere) makes a compelling case that we are in the "Hundred Years' Oil War."
And yes, terrorist groups already have dirty bomb capabilties. This last summer, my daughter performed an internship in Washington, D.C. dealing with nuclear nonproliferation for Pacific Northwest National Labs, a subcontrator for the Department of Energy. As such, she worked closely with the NNSA, and she had a high security clearance and daily read classified documents. While she could not tell me the specifics, she did strongly encourage me to have emergency supplies to last several weeks.
She was heavily involved in the "Russian/Putin" equation this summer; when I would try to explain the intricacies of the situation to others in my congregation, they were largely uninterested.
So, I do believe there will be growth simply because the organization has reached an adherent level with a certain amount of "critical mass."
Justitia