street art as political commentary

I love it when street art gets political and I'm not exactly sure what the artist is getting at. Is this a criticism of Obama not closing Guantanamo despite his campaign promises to do so? That detainees don't have any hope of seeing a fair trial(or a trial at all)? That the artist hopes to get their master of fine arts?
Previously on Uptown Almanac

This is easily one of the smartest wheatpastings I've seen on Valencia in some time. "Sandwich" took stills from the leaked video of two Reuter's staffers and numerous other unarmed civilians being murdered (commonly named "Collateral Murder") and overlaid gameplay from Halo 2 on top of them. Surely a commentary on the soldiers featured in the video, whose impatience while waiting for orders to open fire displayed an utter contempt for human life, as well as modern warfare in general.
As this is Sandwich's second piece of street art to go up this month, it looks like we have a new political street artist roaming around the Mission who is quickly upstaging the more imfamous figures out there.

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