Who says the Nekba was made up? Everyone knows that Arabs consider the establishment of the state a catastraphy... The fact that you are comparing the fleeging and/or forcing out of people from their home to the systematic murder of a race like cattle (in the holocast) shows that you are the one in denial. Like I said a number of times the Nakba can be compared to the throwing out/fleeing of Jews from Arab countries after the founding of the state of Israel..... The Jewish Nakba is truly the one in denial...
"Naqba" translates roughly as catastrophe and the first known mention of it is in 1988. It is celebrated on May 15 which is the day that the State of Israel was declared and the entry of Arab armies to destroy that State.
How does this square with "social structure" as more than 1.2 million Arabs still live in Israel and even have Knesset representation.