Let me add a quote from the book The Suicide of Reason: Radical Islam's Threat to the West, by Lee Harris:
"Muslims are doing everything in their power to encourage their alpha boys to be tough, aggressive, and ruthless. We teach our boys to be good students, to aim at getting good jobs with large, safe corporations, to plan prudently for their retirement. They want their boys to become holy warriors. We are proud if our sons get into a good college; they are proud if their sons die as martyrs. To rid your society of high-testosterone alpha males may bring peace and quiet; but if you have an enemy that is building up an army of alpha boys trained to hate you fanatically and who have vowed to destroy you, you will be committing suicide. It may take years or decades before you realise what you have done, but by that time it will be far too late to reverse your course. The end of testosterone in the West alone will not culminate in the end of history, but it may well culminate in the end of the West."