Wow, what a skewed view of synagogues you have. They look like all sorts of things. Mine gr owning up had a stain glass front in octagons or hexagons, most clear, some with colors & a curved extension to look different than a plain building.
However, tying Jews to Masons & having a goal to take over the world, is classic antisemitism from the fake "Protocol of the Elders" book.
To anyone silly enough to think they are "secretive" try calling one & planning to go. You are welcome to attend our services. Do so at your own risk - of embarrassment when you find out how little it matches all the hate nonsense taught

. But you'll have fun.