What made Judaism appealing to followers?

I believe it because they give people a sense of belonging to a certain community.

Rather than tied solely to religious aspects, Judaism followers treated each other like they're belonged to a close family (they are taught a similar culture, way of life, way to behave, etc.)

This type of sense belonging was really powerful since humans are naturally created to work as a group rather than following individualistic pattern.

Well, God created the World and established Judaism soon after Adam and Eve were cast out of the Garden of Eden. It was appealing because God had a personal relationship with them. He made covenants which stated that He had plans for them. He would protect them if they only followed His laws.