He's the archetypical Scottish penny-pincher (which may be why Disney portrayed him as Scottish) and he hates the holiday. I'd be interested to find out what literary critics have to say about it. I checked the Oxford Companion to Dickens and, although it mentions that nothing aroused more suspicion in him than excessive displays of religion, and that he despised "dissenters" (Methodists), Lutherans and Calvinists and was a High Church sort of Anglican (who also didn't like Catholics, incidentally), it says nothing about Scrooge that would identify him with the anti-Christmas religious movements, but certainly the Methodists, Calvinists and Congregationalists all were suspicious of celebrating the holiday.