Ummm.... you’ve never heard of the “military industrial complex”? This is the type of **** the USA loves to spend much day on. Fits their priorities perfectly.
The US has major security interests in the region due to oil and the US also has many very wealthy Zionist Jewish citizens who lobby the government, donate to parties, and work in government. The neocon movement was led by Zionist hawks like Paul Wolfowicz, Robert Kagan, Bill Kristol, etc