If you want to try to be historical, learn some history.
There was, indeed, a brief period of Jewish persecution of Christians when Christianity was simply Jewish heresy. Following that, there was a slightly longer period of mutual animosity (mostly relegated to the region of Asia minor, with much less animosity in Egypt and Rome) that sort of dried up by the end of the first century.
However, Christians were not “persecuted by the Romans for 3 centuries.” That is the sort of nonsense that indicates a real lack of knowledge. There was a period of roughly 250 years when different Christians at different times in different parts of the empire were persecuted, generally for periods of ten or fewer years at a time. During that period, in those locales where Christians were not actively being persecuted, they often adopted the anti-Jewish attitudes that began to creep over the Roman Empire following the 132 Jewish revolt (in which more of the Diaspora was involved in either sending funds to the rebels or resisting war taxes by the Empire). Throughout that period, when Christians had positions of power, they did, indeed, often (not always) persecute Jews.
Stewart is doing nothing to change anything regarding Christmas, so your argument begins falsely.
O’Reilly does not want to “save” anything; he simply wants to impress his listeners with his continuing attacks on “secular humanism.”
The question is not moot; you has simply expressed a non-question in ignorance.
You are continuing to repeat your base falsehood that anyone claims that simply the act of wishing “Merry Christmas” is offensive. Your false statement has been pointed out by multiple posters. You have now entered the realm of simply repeating an obvious lie to no good purpose.