Why do so many people let the devil deceive them into thinking Jesus was born on the 25th of December?

A couple of days ago I was watching a video on Youtube and Joyce Meyer was talking to a man about the holidays and things and giving advice for the holidays and she said Christmas is the birth of our lord and savior Jesus Christ,after she said that I got so mad because lots of people are still thinking that December 25th is the birth of Jesus when it is not.

There are multiple reasons why December 25th was chosen, none of them to deceive. All it takes is a little research to find the correct reasons why: http://www.ancient-future.net/christmasdate.html