>>718930
Basically, the whole jewish flag thing came out of some guys wanting a universal symbol for the zionist movement shortly before First Zionist Congress in 1897.
So they took the talith(that liturgical cloth they drape over their shoulders) and placed the Star in the middle.
Where did the star come from?
Well, it was a random aesthetic architectural thing.
Slowly, kabbalists started using it, and related forms, to seek numerological meaning, from time to time.
Afterwards, it started being associated as a cultural symbol with Prague jews(which also gave us other Ashkenazi tropes and customs, like golems).
Complaining that some old church has a hexagram is like bitching that some old middle-eastern synagogues have swastikas, from what i read.
You are seeing too much into it, and you kinda mixed the historical periods, to begin with.