True. While they had some level of importance in ancient Near Eastern politics, they are probably one of the most overrated civs.
Sumer, Greece and the Maya definitely should be in, I'm not disputing that. I was just pointing out that some of the civs in the game are not single states, rather, they are groups of states.
Greece was made up of multiple states: Athens, Sparta, Corinth, and more controversially, Macedonia.
Sumer was made up of Ur, Uruk, etc. while the Maya where made up of Mayapan, Chichen Itza, etc.
I'd go with 3 minimum myself, and they would be:
The Cholas
-Representation for the southern end of the subcontinent
-Only Indian state that conquered any part of the world other than the Indian subcontinent, Middle East or Central Asia
Magadha
-First great Indian empire
-Controlled nearly all of India except for the southern tip, as well as parts of Central Asia (although this can also be seen as part of the subcontinent, depends on your definition).
-Under Ashoka one of the main forces that spread Buddhism
-Created the Edicts of Ashoka
-Had multiple great dynasties
(Nanda dynasty)
(Maurya dynasty)
(Sunga dynasty)
(Gupta dynasty)
The Mughals
-Greatest Indo-Islamic state
-Their influence made Urdu an official language in Pakistan and India
-During their reign some of the most syncretism between Hinduism and Islam happened
-Built the Taj Mahal
-The main Indian state for nearly 200 years, existed for even longer
1. You mean they where the Jewish god that the Jewish people where the only people to write about until the rise of Christianity in Rome and Islam in Arabia?

2. The Crusade makes no sense - thats like saying that Australia should be in because the Japanese bombed Darwin! It was the
Byzantines that began the crusade, and the Papal States, Holy Roman Empire, English and Venetians that continued it (I think I might be forgetting some too).
3. The Arab-Israeli war makes some sense - but do modern and ancient Israel really have any continuity? I guess they have some in that they are both Jewish states, meaning that Judah could be added as well in an "Israelite Empire".
4. Yeah, only a colony that managed to create its own empire and nearly defeat the Romans.