Shocking claim that Krema II and Krema III at Auschwitz-Birkenau were bakeries

I found a shocking claim on a blog post of one of the readers who regularly comments on my posts.  Here is a quote from the blog of “little grey rabbit” who calls himself a skeptic:

… the sites at Birkenau known today as “Krema” II and III originally had a much different purpose and and layout than that shown in what are alleged to be the construction blueprints of these buildings.  For reasons which I will not elaborate here, it is my belief that these two buildings were in reality bakeries. Whether that is in fact the case, is irrelevant besides the demonstrable fact that they were not crematoria, or at least not crematoria as were detailed by the blueprints.  My own realization of this fact came some years ago when I noticed the complete absence of underground flues at “Krema” II, underground flues which would be required to connect the ovens to the smoke-stack.  

Artwork done by the prisoners in the concentration camps

Adolf Hitler was an amateur artist and he loved artwork of all kinds, except “degenerate art” (entartete Kunst) which was his name for the kind of art favored by some of the Jewish artists in Germany.  The prisoners in the concentration camps were allowed to do artwork in the concentration camps, although not entartete Kunst.