Yep. This has what has happened in the Arab world. Bunch of testosterone with nowhere to go, so they joined a "Holy War" / "Jihad" and blow up a bunch of people and places. This is also the reason why the refugees from the Arab countries molested women in Germany and Austria.
EDIT: Why the downvotes, because you don't agree with this? Here's some evidence:
See the "Demographic masculinization and Polygamy" section
> In the wake of it, the general level of testosterone of the whole male population will rise, frustrations will accumulate, there will be an escalation of competitive spirit, men will engage in high-risk activities and antisocial behaviors shall multiply. The social equilibrium will waggle and an eventual economic and social instability will endanger the stability of the entire world.
Source: http://socialethology.com/why-young-men-become-terrorists-an...