Whether or not it was emphasised by him, Yasser Arafat did not invent Palestinian culture. He did not invent eating musakhan, singing ataaba songs at weddings or any of the children’s games that Palestinian children play.
To believe that Palestinians have no distinct identity, you would have to ignore the fact that Palestinians are a distinct group within the neighbouring countries that they live in. Families who have lived for 2-3 generations in places like Jordan, Egypt and Lebanon continue to view themselves as Palestinian, and continue to maintain cultural traditions particular to the place they were expelled from.
Your post history shows that you’re an unrepentant genocide denier, so don’t try to pretend that you care what the people of Gaza want. Especially not when your original comment boils down to ‘they’re all Arabs, they should live with the other Arabs.’ Which is a much loved, but entirely bullshit Zionist argument that has been used to dispossess the Palestinians for decades.