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:

Merry Christmas to our Military. Get Obama out of office
MERRY CHRISTMAS , JESUS IS THE REASON !!
He is mental ill Lock him up throw away the key
If he’s not a Muslim than don’t know who is
lmao !!! see how that works for you you$#%&!@*!!!
OH FOR THE DAY WHEN he COMES FACE TO FACE WITH JESUS CHRIST!
well–doesn’t he have a lot of FFFFFFFFFFFFFFFF nerve.
What????
Hmm, I’m curious, whatever happened to that FREEDOM word!!!
Muzzie traitor