I must interject a thought here. I don’t see all the brouhaha about “Happy Holidays” and “Seasons’ Greetings” being PC. We used them all the time when I was growning up in the 40s and 50s. The juxtapostition of Thanksgiving, Christmas and New Years made the phrases sort of a conventinet shorthand. Of course, others motives for their use may vary.
It all depends on the context. If we are talking about the holiday season in general, then Happy Holidays or Season’s Greetings makes sense.
I think what people are talking about is when Christmas festivals in some cities are renamed, or when a Christmas tree is renamed to be a “holiday tree”, or a “giving tree”. That’s when we see clear PC attempts to obliterate mention of a specific holiday such as Christmas.
Of course, it’s okay to mention a specific holiday such as Kwanzaa under the ideology of political correctness. Just don’t say Christmas.