After a wave of attacks hit Nigeria, Inside Story asks what motivates the Islamist group's increasing violence in Africa's most populous country. Guests: David Zounmenou, Jonathan Offei-Ansah, and Anthony Goldman.- Subscribe to our channel: http://aje.io/AJSubscribe- Follow us on Twitter: https://twitter.com/AJEnglish- Find us on Facebook: https://www.facebook.com/aljazeera- Check our website: http://www.aljazeera.com/