unfortunately, all but the first video were "removed by the user" but the first one had the foundations of an interesting discussion.
I can't say I'm well-read enough to develop any defensible opinion on what they are saying (not that I'm not opinionated
) but, I understood Hitchens (who clearly stated he's not very well versed [not in those words] in physics) to locate us in a specific position (on the edge) of the known universe ... on the only planet that, he thinks, has ever supported life.
Well, I don't know that we know enough about the history of this solar system or, for that matter, the universe to make those statements Sooooo... while I enjoyed the clip - found it edifying - I'm inclined, personally, to take his comments with a grain of salt. He also made the statement that there are large tracts of land on earth that will not support life. That, I believe, is, simply, an erroneous statement. I believe the uninhabitable tracts of land on planet earth are relatively small - considering over-all land mass.
I found, as well, some of D'Souza's argument weak. While he quickly referenced Mao, Pol Pot and others, he neglected the Aryan and Mongol wars of the sub-continent. I personally think it somewhat specious to say, "But oh, you simply must mention Stalin." only to ignore Lenin. That, in itself was a weakness in argument. He proved you can't mention everyone. An example was good enough for him - so was it good enough for Hitchens.
In other words, based on what (very) little I heard from both of them, I thought neither did much to support either point of view particularly well - but it was still an interesting snippet.