You are pretty close about why 9-11 happened in my opinion. It is not just US troops in Saudi Arabia following Desert Storm but more or less our overall interest in the region. Which can be traced to one thing which spans Administrations. But our actions and inactions in Somalia actually did have an impact. At least according to Bin Laden:
Describe the situation when your men took down the American forces in Somalia.
After our victory in Afghanistan and the defeat of the oppressors who had killed millions of Muslims, the legend about the invincibility of the superpowers vanished. Our boys no longer viewed America as a superpower. So, when they left Afghanistan, they went to Somalia and prepared themselves carefully for a long war. They had thought that the Americans were like the Russians, so they trained and prepared. They were stunned when they discovered how low was the morale of the American soldier. America had entered with 30,000 soldiers in addition to thousands of soldiers from different countries in the world. ... As I said, our boys were shocked by the low morale of the American soldier and they realized that the American soldier was just a paper tiger. He was unable to endure the strikes that were dealt to his army, so he fled, and America had to stop all its bragging and all that noise it was making in the press after the Gulf War in which it destroyed the infrastructure and the milk and dairy industry that was vital for the infants and the children and the civilians and blew up dams which were necessary for the crops people grew to feed their families. Proud of this destruction, America assumed the titles of world leader and master of the new world order. After a few blows, it forgot all about those titles and rushed out of Somalia in shame and disgrace, dragging the bodies of its soldiers. America stopped calling itself world leader and master of the new world order, and its politicians realized that those titles were too big for them and that they were unworthy of them. I was in Sudan when this happened. I was very happy to learn of that great defeat that America suffered, so was every Muslim. ...
edit: But this has gone far down the Gothic Serpent comparison. Your view appears to be that they should not have gone to the crash site because it was risky. That they should have left a fallen comrade to fall into the hands of the enemy. That Shugart and Gordon should not have been inserted into the crash site. That Streuker and his convoy should not have gone in time and again to save those he could. That runs counter to the creed that those men live by. But different people can view that stuff differently
---------- Post added November-3rd-2012 at 12:54 PM ----------