The bombing of the world trade center in 1993 happened just a couple of years after the gulf war.

If the bomb(s) could be explained by war I think it is most likely it had to do with the gulf war.

Has Osama Bin Laden ever confirmed in a way that he was involved in the  bombing. If not I think one can assume he was not involved. 

If not Americans has only themselves to blame for consequences in years after.

If there for example was a money motive behind the accusations, that had nothing to do with the bombing it is very very serious. "You don't blame innoscent people in such cases without very strong evidence and without trials in a court of law with lawyers present also representing the accused.

Based on my own experiences since 2011 I believe there are good reasons to question if some told stories are true.