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:

Seriously.. brush up on your history and find me a a war without religious overtones
MUSLIM OBAMA SUCKS!
Obama sucks dog$#%&!@*! Oh merry Christmas to all and God bless
No surprise. Muslims don’t believe in Christ.
Education isn’t Hate but ignorance creates controversy
It does not matter what he wore, the fact is that he died for your sins and rose again to prepare a place in heaven for you.
He is totally a mental case and should be locked up before his can cuase any more damage
he looks so much like the grinch , he’s just mad
not much of a person are you obama…MERRY CHRISTMAS anyway ! oh got to hell obama-we know you will!
Merry Christmas Merry Christmas Merry Christmas Merry Christmas