Because its a signal to the world, Israel is ready to reveal their secret: that they have nukes; by the way the worst kept secret in international affairs. It is a step in joining all the other nuclear countries in the world except Paki and India. Israel misses the Iranian threat, The iranians are afraid of Israel because they already have the bomb. Iranian talk is all bravado. It's an indication to the world that we (Israel) have it and we don't have to use the nukes; unles.....
Syrian rebels call for regional alliance against Russia and Iran (Reuters)
from the article: UN body urges Israel to allow nuclear inspection