I noticed I had commented here, another quick thought and new interpretation about the lyrics removing the end of my last post. So in essential human race has a mysterious part in it, which makes them evil. What is it, us or something else?
"What is this gangrene cankering above our heads" ... "Buried and chained deeply within our breasts" ... "Is this just a human extension, A part of ourselves thrown in the outside".
And the end about a child being born "Iron spikes grow from the just fallen doves.". Once he is born he becomes one of the people, fecal. And almost always leads to evil. "Few are those who seem to see it". People are the fecal rebellion. "Infected with a sudden disease: The fecal rebellion. The roarstorm of the lion."
My quick interpretation of the lyrics is that it is how the human race drowns in shit because of the way it is living. At the moment the doom is still looming above us but for our offspring it will be reality. About the end im not sure, maybe some future generation will rebel against this all capitalism etc. trying to change the way of living. But earth is already at a sorry state by then. The overall feel of the song is that it turns very violent.