So what. There are so many facets of Christmas--and Jesus is but one of them. Even those who are atheists or that believe Jesus was non-existent and/or a scumbag can still celebrate the holiday.
So what if the holiday did in fact have pagan origins and you wish to avoid pagan traditions. How many other days of the year have roots in something you would rather avoid? For one, communists honor May 1. What if you, or someone close to you, has a birthday on that date? Would you avoid celebrating it because it coincides with a communist holiday? Or, if there are more than one holiday sharing the same day? Hanukkah and Christmas have been known to both fall on the same day--do observant Jews move it up a week to avoid Christmas? Or do everyone else move Christmas back a week to avoid observing Hanukkah? Last I knew, no.
All this does is allows virtually everyone, save those who cannot enjoy anything for whatever reason, to appreciate Christmas. Some observe Jesus' birthday. Others observe the rebirth of the Sun. Still others observe both. It can be a time for peace and quiet, or a time to celebrate one's material wealth. It can be a time to outdo others on decorating, or to simply enjoy simplicity. And, if you do not observe the pagan part, for you the holiday is not pagan regardless of its origins or that it is pagan for those who observe the rebirth of the Sun. Either way, it is none of the hounders' damn business if someone chooses to participate.
Unless, that is, you choose to drink and drive. You drink and drive, you are putting innocent lives in danger. For that reason, I say Bah! Humbug! to drink driving.