Rabbis.
The leaders of Judaism are Rabbis. The followers of Judaism are the Jewish people.
Judaism today doesn't really have leaders, but if you mean teachers or Rabbis, you would need to study in a formal institution.
There are no churches in Judaism.
rabbis
rabbis
Moses.
Anti-Jewish leaders have been in power since the beginning of Judaism. Some are are still in power today.
Judaism's greatest prophet was Moses (Deuteronomy ch.34). Today, each community has its own rabbi or rabbis, with no central leader.See also:The prophetsMore about MosesJudaism's leaders through history
Judaism is called Judaism.
Judaism is not a centralised religion and does not have a single leadership. The members of Judaism are called Jews.
Judaism.
It was Judaism.