When you do that, you take away the catalyst. But the hordes of directionless males desperate for a purpose in their lives will still be present, waiting for an opportunist to give them that purpose, however bogus. See Eric Hoffer, True Believer.
After 9/11, Ann Coulter said of Muslims, “We should invade their countries, kill their leaders and convert them to Christianity.”
Good advice even today, Sure, we invaded their countries, even killed a few of their leaders, but did anyone even think to convert them to Christianity?