Shaykh Abdul Azeez Aala Shaikh (may Allaah preserve him) said, “Boka Haraam is a misguided group and are from the khawaarij.
Their actions are evil and harmful for Islam and the Muslims.
Their actions are destructive.
Abducting girls is from the actions of a misguided group.
If Boka Haraam are claiming a call to jihad, then it is nothing but ignorance and enmity against Islaam and the Muslims.
Boka Haraam are not upon correctness and guidance because Islaam opposes abduction/kidnapping, unlawful killing and transgression.
Marrying off kidnapped/abducted females is haraam and it is not permissible to give them in marriage.”
Ref: Abridged and slightly paraphrased from http://www.sahab.net/forums/index.php?showtopic=143763
Posted by Abdul Kareem Ibn Ozzie