The stark contrast in the two receptions is based on mutual feelings. GW had genuine respect for the military. Obama is an ignorant, arrogant narcissist with no clue how to run a country or a war. His visceral hatred of the military is palpable, and the feelings are mutual.
Related posts:
http://sfcmac.wordpress.com/2012/07/30/obama-campaign-targets-opponents-on-enemies-list/
http://sfcmac.wordpress.com/2012/02/14/obamas-new-combat-pay-criteria-prove-youre-in-harms-way/
http://sfcmac.wordpress.com/2014/01/08/robert-gates-writes-book-slamming-obamas-leadership/
http://sfcmac.wordpress.com/2014/05/19/how-the-scoamf-in-chief-celebrated-armed-forces-day/