I refuse to buy anything with Happy Holidays on it and I only send out Christmas cards with the Nativity Scene on them now. Our country was founded on Christian principals and I won't change my views on that.
Here is a list of Holidays in December. I personally refuse to pay attention to the islamic ones and the Pagan one. The Afro American Kwanzaa is a ‘made up’ one that appeared in recent years. I've never known a Buddist so haven't been familiar with that one.
Dec 7th Waqf al Arafa———Islamic
Dec 8th Bodhi Day—————Buddhist
Dec 8+9th Eid al Adha——— Islamic
Dec 21st Winter Solstice-— Pagan
Dec 22-29th Hanukah———— Jewish
Dec 25th Christmas-———— Christian
Dec 26th-Jan1st Kwanzaa——AfroAmerican
Dec 28+ 29th Al Hijra———Islamic
If Christmas is your holiday then it's totally understandable that you would choose to buy CHRISTMAS cards and merchandise. I wouldn't expect anything else and I have no interest in trying to convince you to choose "Happy Holiday" stuff.
I understand your preference for "Merry Christmas". I just don't get the hostility towards "Happy Holidays". When you use "Merry Christmas" you aren't trying to knock Hanukkah or force the other person to accept Christ, right? You're just expressing kindness and good cheer to the other person. So why do you assume that someone using "Happy Holidays" is trying to knock YOUR holiday or trying to change YOUR beliefs?