The guy who wrote that is an ex-SEAL no longer on active duty. It reads to me a lot more like his own speculation rather than anything based on actual inside information or evidence.
Absent uncontroverted evidence, I go with the simplest scenario that makes sense the most logical sense, and that SEAL's speculation doesn't meet that standard.
I believe the Navy SEAL, because I already KNOW that Iran lies, and that the State Dept lies, and that Obama lies (A VIDEO caused Benghazi? The IRS has NOT been weaponized? You can KEEP your doctor, and KEEP your insurance? You can SAVE $2500 per year?)