"Apparently we need nuclear weapons to aid the fight against terrorism"
How exactly to we "fight terrorism" with nuclear weapons - bomb Iraq, or Syria, or Nice, or Paris, or London, or Istanbul..... or wherever the terrorists operate? - how stupid can you get.
That's the nature of terrorism - unlike the nations involved in the Cold War, it has no base.
States like Israel and Saudi, whose policies generate terrorism and who, in some cases, finance it, are considered friends and allies; in the case of Israel, they have openly shown that they are prepared to spread terrorism by offering to assist apartheid South Africa to obtain nuclear weapons..
Deterrence has always been a short term and unreliable policy, even when our "enemies" had identifiable locations.
Winning the hearts and minds has always been the answer to world conflict and that will never happen while national self-interest is put first.
Have we learned nothing from the Chilcott rport?   
COST OF NUCLEAR WEAPONS
WHO BENEFITS FROM NUCLEAR WEAPONS?
Jim Carroll