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:

Screw Obama say it anyway
One day God will judge him today we do he’s an embarrassment to our great nation
Yes that was sarcasm
What about the 1st Admendment Obama???? They can say and do what they want , who do you think you are$#%&!@*
Hes a major traitor to our country.
What is his problem
If he doesn’t take care of ISIS soon, none of us will be around to sorry us about Christmas.
Merry Christmas and a happy new year, 2016 WHEN MR. DONALD TRUMP WILL BE ELECTED PRESIDENT OF THE UNITED STATES OF AMERICA! !!!
Direct violation of First Amendment freedom of speech
This really BS