[Cronos]

The Sumerians were a cosmopolitan people composed of various racial groups, centered around the correct geographical area,

Where did you get that?

Sumerian creation myts in the Enuma Elisha place their Eden as Dilmun (or modern day Bahrain)

About their racial background hmmm... there doesn't seem to be enough dna evidence one way or the other.

[muawiyah]

Their language could be a cognate of the Dravidian languages. Or, maybe it just picked up a lot of words from wandering Dravidians ~ or Hungarians ~ or whatever.

It's non-indo-european.

[Boogieman]

“Where did you get that?”

Well, as to the racial aspect, if I remember correctly, I read about in the Pelican History of the World. There were at least two distinct races in Sumeria, because they’ve found caucasoid and negroid remains there.

“Sumerian creation myts in the Enuma Elisha place their Eden as Dilmun (or modern day Bahrain)”

I really don’t care where they thought Eden was, they were living in the correct area that corresponds to the Tower of Babel story.