Who and Why...??

At June 2005, and in one of my blog, there was a discussion about the population of Mosul, does the majority of them Kurds or Arabs. I said the majority are Arabs, while the other idea was the majority are Kurds, mainly in the east side of the city. At that time I checked the Encyclopedias, mainly the Wikipedia and the Encyclopedia of the Orient, in which they said the residents of Mosul are mainly Kurds with minority of Christians and Turkomans, there were no mention of Arabs !!!. I excused the opponent commenter as he know nothing about Mosul but from the net and from what other told him.

What surprise me most is that I came accidentaly to the Wikipedia again, this time I saw the following:

"Wikipedia
Mosul

Mos?l (Arabic: موصل al-Mawsil), Kurdish: Mûsil, or Nineveh (Syriac: ?????) is a city in northern Iraq/Central Assyria. It stands on both banks of the Tigris River, with five bridges liking the two sides, some 396 km (250 miles) northwest of Baghdad.

The population of the area is largely Kurdish, but the majority of the city's inhabitants are Arabs. In 1987 the city's population was 664,221 people; the 2002 population estimate was 1,739,800.[1]"

majority of the city's inhabitants are Arabs.!!! The previous statement didn't mention the Arabs altogether!!!

I checked again the encyclopedia of the Orient and I found this:

"Mosul (m?'s?l, m?s?l') , Arab. al Mawsil, city (1987 pop. 664,221), provincial capital, N Iraq, on the Tigris River, opposite the ruins of Nineveh. It is the largest city in N Iraq and the third largest city in the country. Trade in agricultural goods and exploitation of oil in the nearby oil fields are the two main occupations of the inhabitants. Mosul has an oil refinery; its productivity in the 1980s was hindered by the Iran-Iraq War. While most of the urban population is Arab, the surrounding region has a large Kurdish population. The city is the seat of Mosul Univ. and a center of Nestorian Christianity."

While most of the urban population is Arab!!!. A big change!! isn't it?

I wonder, Did the American Encyclopedias are so ignorant, that they didn't know the real inhabitants of the city of Mosul.? Or, there were other things made them wrote that statements?
Did the referendum on the constitution had any relation to that issue.? If not. What make them change their mind.?

I really want to know.