Complex sentence: Depicting objects of popular respect (religious subjects, flags, etc) in art which includes body fluids can trigger public protests due to such material's historic association with dirtiness; the outcry about the "Piss Christ" photo is an example.
Split into simpler sentences: Depicting objects of popular respect (religious subjects, flags, etc) in art which includes body fluids can trigger public protests due to such material's historic association with dirtiness. The outcry about the "Piss Christ" photo is an example.