@patiodog,
I agree, patio dog, that there can be, as you say, "The same sort of discomfort that you have when dining with a religious wing of the extended family and grace is said before meals"
I feel the same way about Jan. 19th. Martin Luther King day.
But, I do not and have not protested the celebration. Black people have the right to honor their secular saint.
And Christians have the right to insist that retail outlets maintain the tradition using Merry CHRISTMAS instead of Happy Holidays.
If it offends anyone,they just have to grin and bear it, just as I grin and bear MLK day.
Of course, retail establishments have largely restored the Merry Christmas tradition since there are many more people who want it retained that those who claim to be offended--The bottom line--You know.
Cheers,Merry Andrew!