Not to be a bomb-thrower, but outside the U.S., the Bush family connection to the bin Ladin family is well-known. There's nothing sinister or surprising in that, really (if you're in the middle-eastern oil business, it would be weird not to do business with the bin Ladins). There is a lot of speculation about the connection in non-U.S. news sources, and a good newsman like Walter Cronkite would be aware of these speculations.
Such a supposition is somewhat akin to noting the Schwarzenegger family connection to the Kennedy family. Not all bin Ladins' are as Hitlerian as ol' Osama. Witness the book "Inside the Kingdom: My Life in Saudi Arabia" by Carmen bin Ladin.
My husband saw Walter Cronkite in Turkey once in the seventies. They were both at a club that was definitely not within the strict rules of Islam. The topless Blue Bell girls and Walter Cronkite in Turkey has been a source of chuckles at our house for thirty years....but maybe both my husband and Walter were just being gracious to their hosts who thought this is where one would take an American. I know this isn't relevant, but I always think of this when I think of Walter Cronkite.
Being aware of these speculations and believing they mean that Karl Rove is Osama's puppetmaster are two totally different things.
If he ever was a "good newsman", Uncle Walter is no longer. Instead, he's a friggin' kook...