When will Pope Benedict xvi publicly call an end to the murderous Crusades he encourages by the USA and UK?

He most likely won't. But when the khilafah returns, he will be put on trial and I'm 110% sure he will be hanged for his crimes against muslims (unless he become a muslim). It isn't just the crusade against the muslims that he is a part of, but also the fact that he has insulted Muhammad (saw) many time which guarantee's him a death penalty under the Shari'ah.