It’s interesting that he briefly breaks into english. Who’s benefit is that for? His parents? Other english speaking jihadis?
Probably a message to other “foreigners” in Shabaab:
There have long been disputes within al Shabaab about how fanatic one should be and these arguments have caused the organization to split into factions. Since news of Amriki’s death began spreading, so have rumors of other al Shabaab leaders are fleeing, fearful that the hardliners that killed Amriki (by beheading him) will come looking for other moderates.
Some al Shabaab leaders have openly urged their followers to head north, to Puntland (self-governing northeast Somalia), where there are some areas, or at least villages, controlled by Islamic conservative gunmen. But most people in Puntland oppose al Shabaab and will fight to keep Islamic terrorists out.
The most fanatic al Shabaab men are foreigners, and they can either flee to Yemen (which over a hundred have done), or try to survive in Somalia. That is becoming increasingly difficult. Al Shabaab has made too many enemies, and the fanaticism of the foreign Islamic terrorists has made lots of enemies in Somalia. This has also caused an increasing number of desertions by less fanatic Somali members. Al Shabaab is definitely in decline, but it still has several hundred hardcore members, and several thousand supporters (many of them armed, although less and less enthusiastic.)
http://www.strategypage.com/qnd/somalia/articles/20120415.aspx