Sorry, I'm not offended--I am really just amused, principally because Thanksgiving cactus is not a proper name any more than Christmas cactus is.
I am also not a vendor or marketer. If I were though, I could easily take offense at being told I was mislabeling plants and doing bad marketing, because it really is okay for the vendors to call them whatever holiday cacti they want to and market them however they please.
They are different plants, and if I was vending and marketing, I would label them with their different and correct scientific names, not holidaynicknames; I would include cultivar names as appropriate for the many hybrids, and market them all the same.
I fully agree that if the so-called true Christmas types were actually profitable and thus widely available for people to purchase, that there would be a proper distinction.
I do have a x-buckleyi with one bloom on it right now. Next week I am going to call it a Christmas cactus. Later in January, when it really gets going, I'm going to call it the MLK Holiday cactus, and then later in February, as it peters out, I am going to call it the Washington's B-day and the Valentine's Day cactus.
It won't bloom into any other holidays for me, so then I won't need to worry about what to call it, but I will still know what it is.
And, I apologize for offending all of you for having my peculiar take on the thing!
Sorry