Cathedral of Xewkija 2

The five pointed star is the star bethlehem (Christmas) and was long seen as a symbol o the five wounds of christ.

Also a powerful protective symbol.

Most of the pentagram nonsense you can read stems from stupid hollywood movies  and wannabe satanists.

If you look closely you see also the magen David, or hexagram.

Both symbols are biblical - old testament and new testament.

Also used in Freemasonry - which based on biblical allegory and also on hermetism.