Kosovo is a state, no?

The other day at my Raya open house I had one interesting visitor.  She came from Kosovo.  I told her, I was honoured to receive her as this was my first time meeting a kosovar (I am not sure if that is a correct term). I wanted to learn about her “country” as I have heard so much about the conflicts in the former states that made up the federation of Yugoslavia.  Now Kosovo is struggling to gain recognition of her self-declared independence.  She asked me on my personal thoughts about it.  I told her personally I fully support the declaration as the world has recognised Montenegro as an independent state and after all the former states that formed Yugoslavia had been independent since the war of 1991. so now why Kosovo is singled out as having no right to the very principle of self determination? I asked.  I told her that there were 3 basic criteria of statehood, a defined territory, an effective Government and a determined population.  She then questioned me why then the OIC countries were not supportive of Kosovo independence. I could sense her frustration with the muslim countries as strangely Kosovo being mostly muslims different from the Serbs did not somehow get enough support from the OIC countries in their struggle to gain international recognition of statehood.  I somehow thought she had a point. Most EU countries now recognise its statehood and so as the USA. It is I thought different from Taiwan.  To my recollection, Taiwan had never made an official attempt to self-declare its independence  and the Taiwanese and the Mainland chinese are in effect chinese. So Kosovo is a different proposition altogether. Since 1999 it had been under the UN backed administration. So why is it that the OIC is not supportive of this struggle?

I guess if you wished to to know about the history behind Kosovo move, the following is the extract that I got from wikipedia:

When, Slobodan MILOSEVIC became president of the Serbian Republic and his ultranationalist calls for Serbian domination led to the violent breakup of Yugoslavia along ethnic lines. In 1991, Croatia, Slovenia, and Macedonia declared independence, followed by Bosnia in 1992. The remaining republics of Serbia and Montenegro declared a new Federal Republic of Yugoslavia (FRY) in April 1992 and under MILOSEVIC's leadership, Serbia led various military campaigns to unite ethnic Serbs in neighboring republics into a "Greater Serbia." These actions led to Yugoslavia being ousted from the UN in 1992, but Serbia continued its - ultimately unsuccessful - campaign until signing the Dayton Peace Accords in 1995. MILOSEVIC kept tight control over Serbia and eventually became president of the FRY in 1997. In 1998, an ethnic Albanian insurgency in the formerly autonomous Serbian province of Kosovo provoked a Serbian counterinsurgency campaign that resulted in massacres and massive expulsions of ethnic Albanians living in Kosovo. The MILOSEVIC government's rejection of a proposed international settlement led to NATO's bombing of Serbia in the spring of 1999 and to the eventual withdrawal of Serbian military and police forces from Kosovo in June 1999. UNSC Resolution 1244 in June 1999 authorized the stationing of a NATO-led force (KFOR) in Kosovo to provide a safe and secure environment for the region's ethnic communities, created a UN interim Administration Mission in Kosovo (UNMIK) to foster self-governing institutions, and reserved the issue of Kosovo's final status for an unspecified date in the future. In 2001, UNMIK promulgated a constitutional framework that allowed Kosovo to establish institutions of self-government and led to Kosovo's first parliamentary election. FRY elections in September 2000 led to the ouster of MILOSEVIC and installed Vojislav KOSTUNICA as president. A broad coalition of democratic reformist parties known as DOS (the Democratic Opposition of Serbia) was subsequently elected to parliament in December 2000 and took control of the government. DOS arrested MILOSEVIC in 2001 and allowed for him to be tried in The Hague for crimes against humanity. (MILOSEVIC died in March 2006 before the completion of his trial.) In 2001, the country's suspension from the UN was lifted. In 2003, the FRY became Serbia and Montenegro, a loose federation of the two republics with a federal level parliament. Widespread violence predominantly targeting ethnic Serbs in Kosovo in March 2004 caused the international community to open negotiations on the future status of Kosovo in January 2006. In May 2006, Montenegro invoked its right to secede from the federation and - following a successful referendum - it declared itself an independent nation on 3 June 2006. Two days later, Serbia declared that it was the successor state to the union of Serbia and Montenegro. A new Serbian constitution was approved in October 2006 and adopted the following month. After 15 months of inconclusive negotiations mediated by the UN and four months of further inconclusive negotiations mediated by the US, EU, and Russia, on 17 February 2008, the UNMIK-administered province of Kosovo declared itself independent of Serbia.