P F Tinmore said:The Palestinians became a distinct nation of people upon the break up of the Ottoman Empire.RoccoR said:No. The people assumed a distinction that was given by Mandate and the Allied Powers.P F Tinmore said:The Palestinians were citizens of Palestine by law.RoccoR said:Yes, the law as created and written by the Allied Powers.
The Treaty of Peace between the allied powers and Turkey officially ending World War I was signed in Lausanne, Switzerland, on 24 July 1923.121 Setting out the legal status of the territories detached from Turkey, the Treaty had the effect of law in Palestine, as it was extended to this country by an ordinance,122 on 6 August 1924.
The status of Palestine and the nationality of its inhabitants were finally settled by the Treaty of Lausanne from the perspective of public international law. In a report submitted to the League of Nations, the British government pointed out: “The ratification of the Treaty of Lausanne in Aug., 1924, finally regularised the international status of Palestine.”123 And, thereafter, “Palestine could, at last, obtain a separate nationality.”124
Drawing up the framework of nationality, Article 30 of the Treaty of Lausanne stated:
“Turkish subjects habitually resident in territory which in accordance with the provisions of the present Treaty is detached from Turkey will become ipso facto, in the conditions laid down by the local law, nationals of the State to which such territory is transferred.”
Article 30 is of a great significance. It constituted a declaration of existing international law and the standard practice of states. This was despite the absence of a definite international law rule of state succession under which the nationals of predecessor state could ipso facto acquire the nationality of the successor.129 “As a rule, however, States have conferred their nationality on the former nationals of the predecessor State.”130 In practice, almost all peace treaties concluded between the Allies and other states at the end of World War I embodied nationality provisions similar to those of the Treaty of Lausanne. The inhabitants of Palestine, as the successors of this territory, henceforth acquired Palestinian nationality even if there was no treaty with Turkey.131
The automatic, ipso facto, change from Ottoman to Palestinian nationality was dealt with in Article 1, paragraph 1, of the Citizenship Order, which declared:
“Turkish subjects habitually resident in the territory of Palestine upon the 1st day of August, 1925, shall become Palestinian citizens.”
Genesis of Citizenship in Palestine and Israel
Why have you skipped over this part of your link, don't you want the full truth to be seen ?
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Although the nationality of Palestine’s inhabitants remained in transition before 1925, this eight-year period between 1917 and 1925 determined the future of the country’s native inhabitants and migrants. While the 1922 Palestine Mandate and the Treaty of Lausanne recognized a distinct nationality for Palestine, nationality of this country lacked clear domestic regulation. This paper wishes to explore this ambiguous or ‘anomalous’ situation,4 to borrow a term from Lassa Oppenheim.
Or this which shows that there was no Nationality Law for Palestine
Trans-Jordan eventually enacted its Nationality Law on 1 May 1928.16 Article1 of this Law conferred Trans-Jordanian nationality on all Ottoman subjects (citizens) residing in the territory of Trans-Jordan retroactively as of 6 August 1924 – the date on which the Treaty of Lausanne came into force. Trans-Jordanian nationality formed a distinct nationality from that of Palestine, not only in law but also in practice, throughout the mandate.17 Trans-Jordanians, for example, were required to obtain official permission to be admitted into Palestine, albeit with certain favorable facilities compared with other foreigners (such as exemption from possessing passports to enter, and work in, Palestine
Then this that says the Palestinians were still ottoman nationals
In addition to being Ottoman citizens on the basis of the international law of state succession, Palestine’s inhabitants continued at the same time to be Ottomans in accordance with the 1869 Ottoman Nationality Law. The ongoing validity of the 1869 Law was part of the general application of Ottoman laws in Palestine. Thus, apart from military laws executed by military courts, “all civil matters according to the Ottoman law” were dealt by civil courts. Article 1 of the Palestinian Citizenship Order of 1925 considered the habitual residents in Palestine Ottoman citizens .
Although the inhabitants of Palestine remained Ottoman citizens according to international law, in practice they started to be gradually regarded as Palestinians.