Mr Mir, it is logical but not truth and ground reality.Conversion to islam all over the world was directly and indirectly on gun point.It was just a micro-percentage which saints and sufis etc have contributed to.In Indian subcontinent it was agressive casteism (as a result of misinterpretation of holy scriptures by brahamins)which had already fractured,weakened and divided the society to the advantage of invaders. I agree that islam did not spread because of oil engines but it has been helping fanatic islamic ideology to survive and spread.Look at the rulers of oil-rich states.They are not even remotely related to islam or human values in reality.But they are producing and funding more and more fanatics.But good news is that last and final battle on this planet has started on 9/11 and every positive thinking human being knows who will emerge victorious which is none other than non-fanatics.It is non-fanatic people,nations and ideology which will survive and rule and supposed to do so.