Since I began buying commemorative stamps, they always place the special new commemoratives in the drawers of each booth for each Postal clerk.
The "regular" or most published stamps can be purchased in a machine, on a roll, in the grocery store, at Costco, etc.
The limited editions including Christmas stamps, are kept in a folder in a drawer along with all the other special issues.
This author is looking for problems, looking for something to gripe about.
There are many negatives to be found in the US Post Office, but this author just tried to make something out of nothing. It must be desperate times for the author.
I understood the article to say that there were posters up for all the holiday stamps except the Christian ones.
Funny. My post office has all the "other" religious stamps on display, but no Christian themes in sight. I wouldn't assume every Post Office is like those in your area.
The poster also shows the Hanukah stamp, which has been updated this year to a dreidl from the Hanukah candles stamp of years past, and the Eid stamp (no change from prior years).
If anything, the Muslims should be complaining that their holiday stamp hasn't been changed or updated.
I'm also a collector, and YOU don't know what YOU are talking about. The post office is updated now, with shopping kiosks that feature commemorative stamps. Indeed, I've seen these kiosks feature all of the holiday season stamps, including Eid, but not the Madonna and Child stamps.