Yes, Rudolph is based on a true story. Rudolph was created as a Christmas character. He was a reindeer with a red nose. The story was popularized through a song and has since become an important part of Christmas lore.
Well, it depends on what you mean by 'true'. Rudolph was first a fictional character in a storybook. However, over time, Rudolph has become such an iconic part of Christmas that it feels very real to many people. We see Rudolph in Christmas parades, on Christmas cards, and in holiday movies. So while it didn't happen as a real - life event in the traditional sense, it has a kind of truth in the cultural context of Christmas.
The reason Rudolph is a true Christmas story is that it captures the magic and spirit of Christmas. It has themes of kindness, friendship, and the importance of believing in oneself, all of which are central to the Christmas spirit.
Honestly, I doubt it's true. Such stories often spread without proper verification. Maybe it was fabricated for some reason or just a misunderstanding.