I'm not a parent so please do enlighten me as to why kids should believe in a made-up entity, up until some arbitrary age at which point they should be told the truth. Is this some perverse initiation to getting your heart broken or something?
I was raised with the whole santa bells & whistles without ever being told "by the way, he's real". As far as childhoods go it was pretty uneventful and christmas was always fun. Did I miss some crucial childhood enlightenment?
I did the whole Santa Clause bit with my two daughters. Part of it was reliving my own childhood and wanting them to have the same fond memories I did. I don't recall a heart break moment for myself when I realized it was all a ruse. My parents never formally told me. It came on as a sneaking suspicion that eventually became obvious as I grew more aware of how the world really works. And I don't ever recall being pissed off at my folks for leading me on like that. There were still presents under the tree, so what did it really matter?
I'll ask my younger daughter in a few years how she sees it. It's especially interesting in her case, because she cracked the code on Santa, the Tooth Fairy and the Easter Bunny all at the same moment, when she recognized that the notes she'd been receiving from them were all in the same handwriting, and that didn't add up for her.
It is strange that we lie to children, but at the same time, kids have interesting minds, and they seem to really appreciate fantasies, creativity and adventures. This is the one time in their life when they can honestly believe a magic fairy leaves money for their teeth, or that the treasure map they discovered for lost candy in their backyard is real, and left by a pirate 500 years ago. As adults, we lose that magic as we get a better understanding of the world, and we try to relive some of it through movies or games, but for kids, it can exist in reality.
So, yes, we lie to them, but in return they live years in what feels like a more fantastical world, and I think they appreciate those memories when they grow up.
Basically what I'm getting from your post is you want to force parents' hands in telling their kids santa is real, so that the kids learn to mistrust their own parents. Wouldn't it be "simpler" to tell parents to be less awful at parenting and, say, for example, not choose their kids' religion for them?
As for "people lie", I learned that long before I knew how to multiply. I'm not sure how you can miss out on that lesson at all.
You only get to experience that magic once. I'm glad I did.
Some child is going to say that they saw their parents sneak presents and such. Some child is going to naively regurgitate, "after you die, you just get reborn again", which will start a discussion with other children who will retort with their regurgitation, "No, after you die you go to heaven to live forever with your grandma and grandpa."
Not to mention that kids have access to the Internet these days, It will surprise me if there are many kids over the age of 4-5 that actually still believe in Santa unless they really have convinced themselves to do so.
It's more a shared personal tradition than religiously based one, though it can be tied to religion and many people enjoy it that way, though many enjoy it without such tie-ins.
There actually have been Wars on Christmas... waged by Christians themselves: https://en.wikipedia.org/wiki/Christmas_in_Puritan_New_Engla...
It's probably not religion in the sense that anyone actually worships Santa, but he does qualify as a religious figure.
The Moors (which the Black Petes represent) are an interesting chapter in the history of mankind in their own right, and were Muslims rather than associated with the Christian faith, to see them as helpers of a Christian entity must have seemed like a good idea at the time, but in the present it is less so.
This is likely also the reason why 'St Nicholas' hails from Spain for the Dutch because the Moors did in fact inhabit a chunk of Spain at some point rather than from Turkey where he actually was from, a country that the Dutch kids probably had trouble relating to before 1960, but Spain was a lot more visible.
The typical threat parents used to use to get their kids to behave was to threaten them with beatings by the Black Petes and if that didn't work out to be stuffed in burlap bags and taken to Spain...