Israel realizes its position in the region ,unfortunatly, being viewed by its neighbours as an "unwelcomed entity", a view that hasnt changed for over 60 years and therefore has the right to acquire any tool that will maintain its security and ensure its ability to retaliate. Iran doesnt have such a position in the region (among its brothers and sisters!) and doesnt require similar tool. Iran behaviour proves its unworthiness.
Australian police arrest 5 over shooting 'linked to terrorism' (Reuters)
from the article: Turkey PM: If you don't want Iran to have nukes, give yours up