Palestinian National Consciousness Began in 1967

In an interview given by Zuhair Mohsen to the Dutch newspaper Trouw in March 1977, Mr. Mohsen explains the origin of the 'Palestinians':

The Palestinian people does not exist. The creation of a Palestinian state is only a means for continuing our struggle against the state of Israel for our Arab unity. In reality today there is no difference between Jordanians, Palestinians, Syrians and Lebanese. Only for political and tactical reasons do we speak today about the existence of a Palestinian people, since Arab national interests demand that we posit the existence of a distinct "Palestinian people" to oppose Zionism.

For tactical reasons, Jordan, which is a sovereign state with defined borders, cannot raise claims to Haifa and Jaffa, while as a Palestinian, I can undoubtedly demand Haifa, Jaffa, Beer-Sheva and Jerusalem. However, the moment we reclaim our right to all of Palestine, we will not wait even a minute to unite Palestine and Jordan.

Second, if the 'Palestinians' had a 'national consciousness' from the 1920's, why was there no demand for a 'Palestinian state' from 1948-67?