It has been answered. You just don't like the answer.
What is your answer to the US support of Saudi Arabia? A major contributor to Islamic fundamentalists in the region.
ISIS grew from the violence upon the region incurred by the US.
No US invasion of Iraq, no ISIS.
The fact that US slave traders fought with Muslim slave traders a long time ago has nothing to do with the level of power of Islamic fundamentalists today. That is directly related to incursion by the West.
Again, you state it, but you give nothing that would serve as evidence.
I do. My conception better explains the evidence that:
(1) Islamic political, conquest-oriented fundamentalism predates AD 700 and continues today: the Abbasids, Fatimids, Almoravids, Seljukids, Ajuuraan, Mughals, Safavids, Ottomans, Hamas, Al Qaeda and ISIS;
(2) That they cite religious motives and use religious motives to incite fanatical adhesion in their fighters;
(3) That their policies applied where they govern are sharia-based;
(4) That they are intollerant with every religious group (convert or die) that are not Islamic.
That did not come from the US.