Very few of the so called Palestinians who are alive today have long standing ties to what is now Israel and very few were driven off. Their suffering today is very much caused by people like you who cherish it as a weapon to use against Israel. They are not exactly stateless. They are all citizens of the Palestinian Authority which operates in most important ways as a state.
Actually...according to historical records, most were driven off either from fear of conflict (as is often the case)or deliberate actions by the Jewish militias during the war.
Their suffering today is caused by a number of different factors none of which include me.
The refugees in camps outside of Gaza and the West Bank are not citizens of the PA. Most of those in Jordan were given Jordanian citizenship. Those in Lebanon were finally given the same right to work as other foreigners in 2010 after appalling conditions were revealed. A number have been given citizenship. In Syria, no citizenship or right to work. In Saudi Arabia the same. In Iraq the same I think. So yes, many are exactly stateless.
It doesn’t matter how many generations removed from Israel they are, until they are permanently settled somewhere they are still refugees. Which leads to an interesting question. There are many multigenerational refugee camps from long standing conflicts...why is it that ONLY the Palestinians get labeled “not refugees”?
None of that means there is any right of return. I don’t believe in any collective right of return. The Arab states need to do the right thing and fully absorb the refugees outside the West Bank and Gaza. The Arab league set the rule prohibiting Arab states from granting citizenship to the Palestinians, leading to atrocious conditions. They need to do the right thing.