The Star of David is also a symbol for Jesus who was a descendant of King David. Stars (the Star of David or six-pointed star) are also considered symbols for Jesus who was described as ‘the bright Morning Star.’
Here is a must see YouTube video created by a non-Jewish Christian that staunchly defends the Star of David as a Holy Symbol of Jesus Christ. Here it is below-
Whoever finds the Star of David no longer needs the stars of Heaven. He who has found the one who is the root and the offspring of David- the bright and Morning Star- does not need any astrological forecasts. He has found Him of whom Moses, the law, and the prophets did write: the King of kings and LORD of lords. Astrology should follow the example of the wise men and worship Him.
– The Kingdom of the Occult, by Walter Martin, Jill Martin Rische, Kevin Rische, Books.Google.com