Same thing as policeperson, mailperson. Need to be politically correct. As not all celebrates Christmas.
No we don't need to be politically correct,i grew up in Canada,my country,i am Canadian,and for many ,many decades wishing some one Merry Christmas and celebrating Christmas has allways been an integral part of our beliefs and way of life, just as saying the lords prayer and singing god save the queen while at elementary school used to be,if somebody doesn't believe in Christmas or easter etc,thats your choice and thats OK ,if people choose not to participate thats fine but don't expect the great many Canadians that do celebrate Christmas to stop being who we are just so we don't offend others that don't have the same beliefs.
Merry Christmas to everyone