In his speech at UN General Assembly the Palestine President he specified the part of it to the Palestine catastrophe "Nakba" : 

This painful anniversary continues to be ignored and denied by Israel, which is the party that is primarily responsible for this Nakba.  

I call upon you today to criminalize its denial, and to designate the 15th of May of each year as an international day to commemorate its anniversary, to commemorate the lives of the hundreds of thousands of Palestinians who were killed in massacres committed by Zionist gangs and whose villages were demolished and who were forcibly displaced from their homes, with their number reaching 950,000 people, which constituted more than half of the Palestinian population at the time. 

This is the least that the United Nations should do in honor of these victims and in condemnation of this human tragedy.

For several years, we have presented our Palestinian narrative, and the story of our people, which has been deliberately distorted by the Zionist and Israeli propaganda.  We are relieved that the peoples of the world and many of its countries have begun to believe our narrative and sympathize with it, after having been misled for decades. We thank all those who contribute to sharing this narrative and all who support and sympathize with it. We also thank people of conscience everywhere in this world who today are standing up for Palestinian rights and support our people’s struggle for freedom and independence.

My message today to the Israelis is that this hideous occupation against us will not last regardless of their ambitions and delusions, because the Palestinian people are remaining on their land, which they have inhabited for thousands of years, generation after generation, as again confirmed by a recent UNESCO resolution regarding the city of Jericho. They cannot leave their land, and if anyone must leave it must be the occupiers and usurpers.  

My message to the international community is that it should assume its responsibilities with full courage and implement its resolutions related to realizing Palestinian rights.