The funny thing about the "Chickens coming home to roost" comment was who he was quoting. He wasn't quoting Malcom X he was quoting a white foxnews anchor and he directly credited that anchor with it. Of course foxnews won't show you that part of the speech.
Here is the "God Damn America" sermon in its entirety.
When he says it he is saying God should damn America because of what it has done, which is true. America has been responsible or complicit in many horrible things. He talks about many of them in this speech. The only thing I don't agree with in it is his take on HIV.
Tell me how is this different than Hagee or Robertson saying New Orleans deserves Katrina because of their gay pride parades? Or any of the other similar comments by looney pastors/ministers/preachers?