Where is the evil?

Why are so many people afraid to say 'Merry Christmas'?

They say it is because they don't want to offend anyone - they don't want to push religion down people's throats.

Let's break it down, shall we?

Merry

1. Full of high-spirited gaiety; jolly.
2. Marked by or offering fun and gaiety; festive: a merry evening.
3. Archaic. Delightful; entertaining.
4. Brisk: a merry pace.

Christmas

1. A Christian feast commemorating the birth of Jesus.
2. December 25, the day on which this feast is celebrated.
3. Christmastide.

So, basically you are saying 'Have a happy December the 25th!' There is no 'You had better believe as I do or you will rot in hell for all eternity.' in the sentence. It is more like 'I am in a good mood at this time of year and I want you to be in a good mood too.'

It is merely a wish for a happy day.

Merry Christmas Everyone.