Abraham.
Judaism does not have a centralized leadership.
Jerusalem
Israel
Rabbis and cantors
Prophet Muhammad (peace be upon him) is the original leader of Islam.
Of course not.
The is no such thing as a "judaism".
The leader of Judaism is the patriarch of the family of priests, known in Hebrew as the Kohen Gadol or "high priest". The family are responsible for all services, operations, and activities in the Holy Temple. There has been no Holy Temple, no functioning family of priests, no Kohen Gadol, and no single leader of Judaism, for roughly 1,940 years.
Jews worship in synagogues.
Belief in God and in the Torah.
No, Jews worship in synagogues.
Judaism's primary language is Hebrew