If one cannot call Christmas by that name what is its point anyway? And how is holiday (Holy day) any better for those supposedly offended?

I ask these questions as a non-believer who is not offended. The feast that people are observing needs its name, be it Christmas, Yom Kippur, or the anniversary of Kermit's first panic attack. Let folk celebrate whatever event(s) they wish, in the manner of their choosing, subject to normal behavioural bounds.

I have not encountered anyone professing a non-Christian religion who voiced an objection to the term Christmas. In my experience such objections generally come from militant atheists, or from a few nominal Christians who lack the courage of their convictions.

Mind you, I would happily see the event confined to the twelve days, but that is a matter of taste, and of boredom threshold.