Today is "wrong" to say "merry christmas" it must be "happy holidays" (because of the jew and muslim scum). It is not pollitically correct to say that we are heterosexual (at least we must be metrosexual). In cities like NY, São Paulo, London, Paris, etc, being gay is equal to a social high level status, while we have kiss minorities asses. WTF is going on? Do we need our good father Hitler to come again?
Being Jewish, people tell me Merry Christmas all the time - as it is their religion. I even tell them Merry Christmas, why not, especially if I know they are celebrating it. Your head is up your ass if you think it isnt politically correct to say Merry Christmas. You can, no one will stop you.
BUT - in a business world, when you are selling products, at a store level, in advertising, it is better to say Happy Holidays so you get everyone involved. Why not? There is only one color in selling products at a store level and that is green.
When you learn that, you might be more successful in your endeavours.
As for Hitler, the man caused the deaths of 60 million people. And like the shameful man he was, he killed himself. But we all know that anyway.