The Obama administration has directed the military to not allow personnel to say “Christmas”, in spite of the holiday’s status as a federally-recognized holiday.
The reason given by armed forces officials is that not everyone celebrates Christmas and that out of respect for them, military members should refer to Christmas celebrations simply as “holiday”-themed festivities.
This prohibition comes in the context of a wider push for political correctness in society in general and the military in particular, as evidenced by the recent reprimanding of Navy Chaplain Wes Modder for simply discussing religion, as chaplains are wont to do, with military personnel.
See how servicemen have reacted to not being allowed to say Christmas at the link below:

This bum is really cruising for it.
By the way, Merry Christmas Mr. President…
he is a lier and a muslim impeach the jerk
Congress and the Senate are you going to stand for this?
Time for this Muslim to leave the Whitehouse
Obama is a poor excuse for a person.
Screw him! Tell him to go to hell…….
CONGRESS and SENATE WHAT ARE YOU GUYS DOING LETTING THIS GUY PASS ALL THESE LAWS ? ARE YOU INCHOOTS WITH HIM OR U AFRAID OF HIM?
You to friend.
tell the big o to suck it up.