The Ringleader of Boko Haram: British Born

Aminu Sadiq Ogwuche was held in Sudan on an
international arrest warrant

He attended a university in the UK and was "radicalized" at that university.

From the Telegraph (hat tip to Mark Alexander of A New Dark Age Is Dawning):

Aminu Sadiq Ogwuche, arrested on suspicion of carrying out bomb attacks in Nigeria, threatened to cut off hands of non-believers while living in Britain

A British-born "ringleader" of the Islamist group responsible for the kidnapping of hundreds of school girls in Nigeria was radicalised while studying at a UK unversity, according to friends.

Aminu Sadiq Ogwuche, 29, was arrested on Wednesday in connection with two recent bombings carried out by Boko Haram in the Nigerian capital Abuja that killed nearly 100 people.

He is suspected of co-masterminding the attacks - one in the suburb of Nyanya that killed 75 people on April 14 and a second attack just yards away which killed 19 earlier this month.

Interpol put out an international arrest warrant for Mr Ogwuche, who was discovered after a reward of £100,000 led to his discovery in Sudan.

Mr Ogwuche, who is the son of a retired Nigerian colonel, was said by fellow students at University of Glamorgan in Wales to call himself "The Lion of God" and threatened to cut the hands and feet of non-believers while living in Britain....

Read the rest of the Telegraph article HERE.

So, he experienced Western freedoms, then rejected them.