Because the (undoubtedly sympathetic) reporter knew Dingell would be hard-pressed to answer that question.
If we're hit with Islamist nukes and are unable to positively determine which nation helped the particular terrorist organization in question, I strongly suspect we would not just continue along doing what we've been doing -- attempting to bring individual terrorists to justice. Our nuclear arsenal would be used. .....and Mecca is undoutedly on the short list.
The so-called "moderate" followers of the pedophile prophet better get a handle on their cult's jihadists or they'll awaken to a nightmare.
Mecca, Medina, and the Dome of the Rock.