I've heard this theory and find it plausible that Morsi did orchestrate an attempt to kidnap Amb. Stevens. The thing I can't explain, though, is that when it failed due to Stevens' death, why didn't the U.S. drop Morsi, the Muslim Brotherhood, and Egypt in the grease? Why participate in covering it up?
Did you forget that we had a Muslim president at that time, and also that Hillary and Morsi are good friends? Hillary might have had advanced knowledge of the Benghazi attack or even helped ENGINEER IT BY STRIPPING STEVENS OF HIS NORMAL SECURITY DETAIL JUST PRIOR TO THE ATTACK in order to ensure he be taken hostage for Morsi. Stevens asked Hillary for more security just prior to the fateful date (9/11/12) and HILLARY DENIED HIS REQUEST.. WHY?
Morsi's #1 campaign pledge to Egypt was getting the Blind Sheik out of U.S. custody. THIS WAS HIS #1 PROMISE TO THE PEOPLE OF EGYPT!!! Benghazi was a way to capture a high profile hostage (Stevens) and use him to gain release of the Blind Sheik. Some believe Obama himself was involved as he would need a really good excuse to release the Blind Sheik.
Allegedly against orders, 2 Navy SEALs showed up and spoiled the plot.
FWIW, the Muslim Brotherhood was deeply embedded in the Obama administration so how could Obama possibly throw them under the bus after the Benghazi attack?
Some also believe Stevens was involved in weapons transfers in the formation and creation of ISIS and Hillary needed him dead because he knew too much. Think 'Seth Rich treatment'. The Clintons have a way of making people disappear after they are done with them, but I believe Benghazi was a hostage-taking of Stevens gone bad.