Why the Republican Right Wing hates Hagel as Secretary of Defense.

Chuck Hagel is a Republican who was not all gung ho on  GW Bush starting the war in Iraq among other policies which bother the Republicans.  The more I read about him, the more I am thinking he might be the right pick.

http://www.slate.com/articles/news_and_politics/war_stories/2013/01/chuck_hagel_for_secretary_of_defense_republicans_wants_to_block_him_from.html