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:

He can’t stop them
I’ll bet they can say Ramadan. Wake up people, they are using Islam to start a world totaltarian communist government. Jesus is Lord !!!!!! ….and MERRY CHRISTMAS !!!!!!!!!!
CHRISTMAS, CHRISTMAS, CHRISTMAS!!!!!!! MERRY CHRISTmas!!!!!!
they will say christian any time they waqnt and you wont even know
Merry Christmas u pile of sh t
Who gives him the right its supposed to be America right?
He needs to get out of office. He shouldn’t never be put in office.
This is a lie! There is no truth to this at all. Do people really believe this?
Merry Christmas, POTUS. Hopefully I did not offend you!!!!
And not wanting refugees here is supposed to unamerican?