For years, Israeli leaders and their friends in the western world have portrayed Iran as an existential threat to Israel. What is the truth in this matter?
Probably the best source for such info is the SIPRI Military Expenditure Database which contains consistent time series on the military spending of 171 countries since 1988, and of NATO member states from 1949 or from when they joined NATO. You can access the database by clicking here.
Here are some other links to find the answer: (click here, here and here).
In the Foreign Policy, Trita Parsi writes, "Quantitatively, Iran’s military expenditures have sunk far below those of its Gulf rivals. In 2014, according to the Stockholm International Peace Research Institute (SIPRI), more than 25 percent of Saudi government spending was devoted to beefing up its military assets — expenditures that totaled more than $80 billion. Along with the United Arab Emirates (UAE), which spent nearly $23 billion, the two Gulf Arab countries comprise well over half the $173 billion in military expenditures spent by all Middle Eastern countries that year.