The "spirit" of Christmas has almost nothing to do with JC, and more about giving. People want to call it an American holiday or a religious holiday, both for which a point can be argued, but I think it has really become a worldwide symbol for altruism and showing brotherly love to each other. If you don't like Christmas for religious or anti-American reasons, then you have are only deceiving yourself; and if you don't like Christmas because you don't like buying people presets, then bah-humbug to you 
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"The true value of a human being is determined primarily by the measure and the sense in which he has attained liberation from the self." -Albert Einsetin