During his teenage years Spiro attended the Bulgarian Men's High School of Thessaloniki, then part of the Ottoman Empire. In 1912 Skopje was ceded to Serbia where the Macedonian Slavs were faced with the policy of forced serbianisation. When during World War IBulgaria occupied Macedonia his father, Georgi Kitinchev became a mayor of Skopje. At the same time he studied in Lausanne, Switzerland. Spiro was involved there in the organization of Macedonian students called MYSRO. In 1919, during the meetings of the Paris Peace Conference, the MYSRO issued appeale in favor of an independent multiethnic Macedonian state, based on the principle of the Swiss Confederation. After 1919, Kitinchev returned to Skopje, then part of Kingdom of Yugoslavia. He was among the founders of the "Luc" magazine and a propagandist of the idea of publishing materials of local dialect. At the time he became a member of the right-wing IMRO regional committee. During 1930s Kitinchev was arrested several times by the Serbian authorities. In 1936, together with Dimitar Chkatrov and Dimitar Gyuzelov, he joined the democratic organization MANAPO. In 1930s a more homogeneous generation was growing up in Vardar Macedonia, which resisted serbianisation, but which also made it clear that the Bulgarian national idea was no more the only option for them. During the Invasion of Yugoslavia in April 1941, Kitinchev was elected vice-president of the Bulgarian Action Committees After the town subsequently was annexed again by Bulgaria he became a mayor of Skopje. Despite the slight change of the younger generation in the 1930s, anti-Serbian and pro-Bulgarian sentiments still prevailed. There is a no doubt that the Bulgarians were greeted as liberators. The Macedonian national identity then hardly existed. In the early September 1944 Bulgaria ordered its troops to prepare for withdrawal from former Yugoslavia and on 8 September, the Bulgarians changed sides and declared war on Germany. On the same day pro-German puppet state was declared by right-wing Macedonian nationalists and among its leaders were Kitinchev, Vasil Hadzhikimov, Stefan Stefanov, Dimitar Gyuzelov and Dimitar Tchkatrov. They had foreseen the future of this independent Macedonia under the protectorate of the Third Reich. The state had to have a Bulgarian character and its official language to be Bulgarian. Without the means to make the state a reality, this pretense dissolved as soon as the Yugoslav Partisans asserted their control following the withdrawal of German troops from the area during November. This event marked the defeat of the Bulgarian nationalism and the victory of the Macedonism in the area. Yugoslav Communists recognized then the existence of distinct Macedonian nationality to quiet fears of the Macedonian Slavs that they would continue to follow the policy of forced serbianization. For them to recognize the inhabitants of Macedonia as Bulgarians would be to admit that they should be part of Bulgaria. The new authorities accused Kitinchev, who was already arrested, of being Bulgarian nationalist and Bulgarian fascist occupiers collaborator. Kitinchev was sentenced to death, but later this sentence was changed to 20-year prison. He died in Idrizovo prison after a year of tuberculosis and torture.
