It is possible that there are a number of different motivations for this person to have done what he did:
1 - Didn't like shipping out
2 - Felt "picked upon" as a Muslim by other soldiers
3 - Felt isolated and unable to really connect with anyone
4 - Believed fully in the Koran and became more fundamentalist
5 - Was suicidal anyway, IOW had mental problems
6 - Figured that "taking down" a few others along with himself was more "heroic" than just taking his own life
7 - Wanted "out", especially of the army, and no one cared what he wanted
In any event, it was a "terrorist" attack. They called Timothy McVeigh's attack a "terrorist attack". What is the definition anyway? Is the definition based on motivation, or on methods?
My suspician is the "people in the know" (you know, the ones smarter than we are), don't want us to focus our animosity towards Muslims because they are trying to have a "peaceful" relationship with them. (A lot of prayer will be needed for this to be successful.)
They think they must not let anyone get too upset about this "lone" gunman, because we all need to work together, and get along, and forgive each other in the name of peace. They are trying to de-escalate a war started by a President they did not like. They are desperately (with their heads in the sand), trying to undo the "damage" to world relationships done by our former President, and that means keeping us peons calmed down and unresponsive to aggression.
Actually, in the name of world peace, don't you all "see" that we must ignore the radical wing of Islam?
In my opinion, these attitudes and delusions are all playing into what is supposed to eventually happen, and that is a push towards a one-world government. Lord Jesus, you are the only one I trust for everlasting peace.
Come quickly! In Jesus' Name I Pray.
Jesus said unto him, "I am the Way, the Truth and the Life; no man cometh unto the Father but by me." John 14:6