Who Killed Barack Obama?

Last year artist Peter Fuss created a controversial billboard depicting Barack Obama as deceased.  His piece was part of an exhibit entitled Out of Sth.  The exhibition statement reads as followed:

"The first exhibition in Poland which presents the works of twenty leading European and Polish artist whose art derives from broadly understood urban art.  Different attitudes, various ways, similar origins.  Classical or political graffiti was a significant point for the development of each invited guest.  The fact of interfering into urban atmosphere with egocentric tag or graphics taken from the patter influenced the way the artists think, act, create and share with their mature and personal art.  Those attitudes which derive from counter cultural and alternative acts of urban activism, seize new areas of social operation and mass culture such as graffiti, street performances, tattoos, cartoon, typography, photography, illustration or person creation.  The exhibition does not literally transfer street art into sterile space of the gallery but is rather an attempt to change stereotyped way of its perception, it is the attempt to show that the barrier between high art and marginal urban art is weak.  It aims to present the inspirations, philosophy and social dimension, crucial for this art,  which reflect contemporary, democratic tendencies to participate in culture.  The violent mixture is created by the attempt to equal working in studio and working in urban space.  This mixture will govern BWA Wroclaw and the streets of Wroclaw for a month."

The issue this piece presented (pictured above) was that it did not ask if Barack Obama had died, but rather who had killed Obama, insinuating that he was already deceased.  Not only this, but the work plays off of the viewers perception of reality, reading anything as fact.  Furthermore, it causes the same dilemma that the Axis of Evil: The Secret History of Sin exhibition created in 2002, after President Bush declared Iraq, Iran, and North Korea as the "Axis of Evil."  One specific piece within the Axis of Evil exhibit, entitled the Patriot Act, was banned at a point during it's tour of the nation.  It was feared that the image of President Bush with a gun to his head promoted too much violence in an already murderousness society.  Also, it seemed to advocate harm against the leader of a nation, which Fuss's piece seems to do as well.  Both pieces generate a lucid way of looking at politics.  To read more about the Axis of Evil exhibit, and view more of the pieces included, follow this link.

What often stirs the art community with controversial pieces, similar to these two, is the censorship that the public feels needs to be applied.  Often, it comes to a general consensus that people hold a duty to protect the viewer from experiencing uncomfortable and unsettling feelings in regards to work.  Granted, there are definitely works that have been created and displayed that stir emotion, such as The Night Cafe in the Place Lamartine in Arles by Vincent Van Gogh.  The difference though is that paintings such as Van Gogh's create emotion of mental uncertainty, a internal questioning.  The images of Out of Sth and Axis of Evil, however, create emotion dealing with national uncertainty, an external questioning, which could develop into a tangible uncertainty.  It is understandable the censorship executed in this context, and this is coming from an artist.  What I have yet to understand is why they accepted the exhibition in the first place, knowing what was going to be displayed?  This further stirs up what is acceptable to be censored, and when it should be executed.  Any thoughts?