Why is it that some people believe in God but they don't believe in Santa. What is the difference between them? Surely so long as people believe in both of them they are as real as each other.
If Mummy and Daddy tell you, when you're very young, that God and Santa both exist, you're likely to believe them.
If, at around the age of 8 (?), Mummy and Daddy, tell you that Santa doesn't exist but that God really does, you're likely to revise your belief in Santa but to continue believing in God.
Because adults who believe in such things are not rational. The sad thing is, they are taught to be irrational. Before they can even talk, children are christened. Before they can write they are told stories and act them out on stage. They pray at assembly and are taught hymns and carols.
I am not religious, but your question seems inherently ridiculous.
I believe there are those who were never religious in their lives who underwent a "conversion". How many, I wonder, were converted to a belief in "Santa Claus" in later life :-)
These false comparisons are really the curse of serious thought.
Whose reindeer's antlers are those popping out of your toaster by the way?
As anyone who's IQ is larger than their shoe size will tell you, all religion is compete cobblers. However most saints where in fact real people. Saint Nicholas of course is one of the most famous. Leaving aside MIT's calculation of his delivery system he does serve as fantasy for our children. Beyond the religious uses he is in fact famous for other reasons, the pawn brokers balls for example. To summarise St Nic is a real person "God" is not real except in the minds of the weak and foolish.
Can anybody pinpoint for me when British tradition lost it's Father Christmas i.e. when his mantle was taken up by the US creation (based on Dutch folklore) Santa Claus?