Jews (shortned form of "Judeans") are an ethnoreligious group which descend mostly from the Biblical Israelites of Israel, and other people amongst whom they sat in exile and admixtured with (mostly as converts to Judaism, their national religion). They're the nation/ethnicity of Jesus Christ, Kyle Broflovski and his family, and the South Park Jewish Community.
They are frequently mentioned in the series, mostly by Eric Cartman who mocks them in racist manners and when displaying his hatred of Kyle.
It is important to note, however, that the way Jews are portrayed in the series (Ultra-Orthodox Jews) is not how the mainstream Jews dress, as this way of living (depicted in the series) had started as a cult in Ukraine and Poland in the 15th and 16th Centuries which mimicked the dressings of noble Poles and spreaded due to these type of Jews' migrations elsewhere.
History[]
The Jews' religious narrative speaks of their gathering as a nation in the Exodus out of Ancient Egypt, led by Moses, their first ever prophet, who led them from Egypt to the land of Canaan, their "Promised Land", and then they eventually formed a kingdom there called Israel with Jerusalem as its capital city under kings Saul, David and Solomon, but after Solomon died, the kingdom was divided into a northern kingdom called Israel with its capital at Samaria and a southern kingdom called Judah, which kept Jerusalem as its capital and was ruled by Solomon's descendants.
Archaeology-wise, the Jews' ancient roots are in the Levantine Iron Age era's Kingdom of Judah and the remnants of the Kingdom of Israel who assimilated into them following the Assyrian destruction of Israel in 722/1 BC; they were later exiled by the Babylonians, who destroyed their 1st Jewish Temple in Jerusalem, to Syria, Iraq, and Iran in 2 phases between 597 BC and 586 BC.
They were allowed to return to Israel and re-establish their ancestral homeland once Cyrus the Great was in throne in 538 BC, this time however being a sub-unit of the Persian Empire rather than a kingdom on and of its own - and renaming it "Province of Judea".
They maintained their national homeland, through times of severe despair such as the Jewish-Hellenistic war events of Hannukah in 165 BC & 164 BC; and the Jewish-Roman wars which led to the destruction of their 2nd Jewish Temple in 70 AD, till 135 AD when they were stipped off their national rights by the Roman Empire and changed the name of their homeland to "Palestine", that also exiled many of them as slaves to Europe and North Africa. They were later subjected to the cruelty of the Byzantine Empire which opted to convert them all to Chrstianity, thus starting to migrate elsewhere to pagan lands, with only a small portion of them remaining in Israel for all the time of the exile. Their persecution in Europe ultimately culminated in the Holocaust, a mass murder carried out by the Nazis during World War II, which resulted in the deaths of 6 million Jews. However, the Nazis were defeated by the allied powers and the Jews were freed and started to migrant to the region of Palestine, which would later become Israel.
In 1948, the modern State of Israel was established, and the Jews had returned in their majority to live in the Land of Israel.