Here is one example from May 2005 of David claiming to be a Christian. He actually states it twice in the same paragraph:
David J. Stewart says "I am a born-again Christian..."
Source: http://www.jesus-is-savior.com/Evils%20in%20Government/Terror/bill_oreilly_on_terror.htm
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On http://www.jesus-is-savior.com/False%20Religions/Illuminati/tower_of_babel.htm, David contradicts himself saying "I personally am not a Christian or a member of any religion for that matter...":
David J. Stewart says "I personally am not a Christian..."
Source: http://www.jesus-is-savior.com/False%20Religions/Illuminati/tower_of_babel.htm
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Here's is an example WayBack Machine snapshot of his page from July 28, 2013:
David J. Stewart says "I personally am not a Christian..."
(Snapshot from 7/28/13 courtesy of The WayBack Machine)
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Based on his statement, David is either outright lying throughout his site when he tells you that the Jesus of the Bible is his savior OR perhaps he is following another Christ.
This is probably the most glaring contradiction he has made. A saved follower of Christ is called a Christian. You either follow Jesus Christ or you don't. If you aren't a Christian, David, then what are you and who do you really follow?