I couldn't find confirmation of your declaration. Nevertheless, his position on One World government was appalling. From his Wikipedia bio:
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Cronkite contrasted his support for accountable global government with the opposition to it by politically active Christian fundamentalists in the United States:
"Even as with the American rejection of the League of Nations, our failure to live up to our obligations to the United Nations is led by a handful of willful senators who choose to pursue their narrow, selfish political objectives at the cost of our nation’s conscience.They pander to and are supported by the Christian Coalition and the rest of the religious right wing. Their leader, Pat Robertson, has written that we should have a world government but only when the messiah arrives. Any attempt to achieve world order before that time must be the work of the Devil! Well join me… I'm glad to sit here at the right hand of Satan."
In 2003, Cronkite, who owned property on Martha's Vineyard, became involved in a long-running debate over his opposition to the construction of a wind farm in that area. In his column, he repeatedly condemned President George W. Bush and the 2003 invasion of Iraq. Cronkite appeared in the 2004 Robert Greenwald film Outfoxed, where he offered commentary on what he said were unethical and overtly political practices at the Fox News Channel. Cronkite remarked that when Fox News was founded by Rupert Murdoch, "it was intended to be a conservative organization — beyond that; a far-right-wing organization". In January 2006, during a press conference to promote the PBS documentary about his career, Cronkite said that he felt the same way about America's presence in Iraq as he had about their presence in Vietnam in 1968 and that he felt America should recall its troops....
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It is we who can rest in peace today; but only for a moment. The damage he did with his self-righteous, self-important talking-head vanity has yet to be fully unleashed. Blood is on his hands, both from the Vietnam conflict and from the emboldening of radical Islam towards us as a result. Our God is a merciful God. He has an infinitely bigger heart to understand whatever motivated Cronkite (whose original, Dutch-origin name was Krankheyt) than I do.
Krank-hate indeed.
When it was FIRST reported that he was gravely ill here at FR. A FReeper posted information where Cronkite had been interviewed and was ask the question about God and he proclaimed he was a atheist in his eastern elite arrogance.