Taking nice sayings and misunderstanding them can be quite problematic. If your parents paid homage once a year to Adolph Hitler Y’S, would you be obligated to do so as well? The same way you have someone guiding you along your path to Orthodox Judaism, it is important you keep in touch with and consult with this person at all times so that you do not take erroneous leaps because you read something on a website.
As for the holiday celebrated on December 25th. Looking honestly and objectively at the holiday, what part could a believing Jew take part in?
Now, as to the origins of this holiday, read what some historians have to say.