Lazy illiterates shouldn't bother. (TL;DR: Fuck off)
I really couldn't give a shit less what being 'American' is...which at this points is embodied by obesity, greed, ignorance of the world abound and sucking off celebrities. Other than that...I care more about the ants I accidentally step on into my way to work. I do the Santa thing because it's fun for the kids, it expands and promotes imagination as long as it's controlled and lets my nostalgia run rampant before my childhood went to shit. I like it, and like others have said, for a certain age-range, it's fun. My not-girlfriend-girlfriend has two toddlers, one is 4 and is extremely smart, and the other is 2 and has a bit of a learning disability (and still, oddly enough, is much less of a little devil than most of the kids in his class as far as I've seen...which is a lot, much to my dismay). So I'm telling the 4-year-old, slowly, hinting bit by bit, that Santa is more of a concept and an idea for 'kids' than he is a real thing. Now, when I say this kid is smart...I've seen multiple parents, including my own father, say, "What is he, 6, 7?", and many people have asked if he's even older than that. It helps that he's fucking huge for his age, but he's just downright SMART. It's cool.
The one with the disability is an angel, but he learns differently and is more practical than he is book smart. Ironically, he seems to have more common sense about the world than the 4 year old but he's behind on his books. That said, I think it'd behoove his imaginative mind and general well being of expanding that aspect of learning to let him run wild with the concept of a jolly fat man in a red suit coming down the chimney to bring him presents if he doesn't throw tantrums a bit longer.
He's definitely embodying the 'terrible two's' aspect to a T; for as much as I love him, he's a little shit sometimes. So that whole prospect that 'if you're good, you'll get presents from this fatass' (I do word it a LITTLE different) is a great help to both of us until he reaches an age where he's more prominently logical.
All that said, I'm not religious at all, and I tell people whom I speak with about religion that my religion is "I don't know what the motherfuck is going on". My not-girlfriend-girlfriend is religious, Christian, and while she's not a bible-thumping ignorant, she's pretty into the whole concept of a classical god. That part...kind of overruns her and their Christmas. For me, it's all fun and games. So she tries to give Santa this fucking overarching theme and moral comeuppance while to me, it's more fun than anything. I get that it can spur on a moral compass and can help skew bad kids to be good...but her kids aren't that, and that's the part where we usually have issues. Either way, it's fun nonetheless and it's something that I really hope to continue for as long as I can with them, even when one of them pretty much now knows that it's bullshit and we more or less give them presents ourselves, STILL only if they're good. That is the part I like...they (or rather, just he) knows that it's still based around being a good person and doing good things and keeping mommy more or less... LESS insane than she already is.