There are some (but not many people) who will get upset at you if you tell them "Merry Christmas". These are generally people who dislike Christianity or anothe

There are some (but not many people) who will get upset at you if you tell them "Merry Christmas". These are generally people who dislike Christianity or another, and/or whom dislike its pervasiveness in American culture over other religions. Likely more prevalent are the people who don't like corporations, public services, etc. wishing everyone Merry Christmas year after year while ignoring the holidays of other religions. To avoid all of this, many places are switching to "Happy Holidays", except there are a not-insignificant number of people who are upset by this and feel that companies/governments should be saying "Merry Christmas" because they should be aligned with Christianity.