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
Who listens to that enemy of America ?
Merry Christmas Everyone and God Bless
Sit down and MERRY CHRISTMAS Obummer!
Two words for this directive one is a verb , the other is a pronoun.
He has no right under our constitution, which he had sworn an oath to uphold and defend when he became our President, to make such an order!
F him. His time is coming.
So if this is true surely our military will just laugh at the fool & say what the want to say & shoot anyone that tries to enforce it!
Merry CHRISTmas barack hussyne obame
Impeach him before he does any more damage to our country! The Generals at the Pentagon need to arrest him and try him for treason! He took an oath to defend the Constitution and he’s ripped it apart. This has to stop, he’s a power hungry dictator! Our Congress and Senate needs to get involved and stop all of his executive orders.