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:

WTF
Its a shame this great country has a sick’o running it. he should have been impeached long long ago.
Congress..shut this man down.
Obama is a worthless moron
Time to go to WH email and send Merry christmas cards
If this is true, and I say if knowing Facebook and the internet, he should be drawn and quartered! What happened to freedom of speech???
obama, you know what you can do with this stupid order, just as stupid as you are. loser
Illegal orders are not followed..
merry christmas obama
People are sick of the way obama is doing to our country. Congress needs to step up & stop obama’s radical, unjust & unAmerican ways.
He has shown to allow Muslims ways. Get him out of the White House.