There’s widespread agreement around Christmas as a historical event, but people are confused about the Trinity, per a recent survey. Christmas is a celebration of a real event, according to most Americans. Just don’t expect them to know exactly why Jesus was born and came to earth. A new study from Lifeway Research finds close to 3 in 4 Americans believe Jesus was born in Bethlehem more than 2,000 years ago. Even more say Jesus is the son of God the Father, but less than half believe Jesus existed prior to being born on that first Christmas. “Most Americans consider…