And I had a Jewish friend who told me that Hannukah was considered a "minor" holiday until Christmas hit the big time.
I’ve heard the same. Some of the earliest colonials came from sects that forbade celebrating Christmas.
The concept of Santa and the use of Christmas trees truly caught on during the 19th century in Europe and the US. Trees used to be a soley German tradition, if I’m not mistaken. The European nobility adopted the tradition within the first two decades of the 19th century. Plus, the majority of carols we sing today were written in the mid-1800s.