Here is why right of return is a ridiculous proposal:
The entire point of Israel is that they have their own space. Not to be twats about it, but because they literally spent thousands of years as Dhimmi and they want a space to live as they choose, not under Islamic rule. That's the entire point.
There was just under a million Palestinians in 1947 in what is now Israel, and that is now almost twice that - making up 20% ish of the population.
There are now something like 7 million (maybe 8 million) Palestinian refugees. Obviously not from 1948 (there was only 700k then and most if not all are dead), but this is from other things - various wars, strife, or they are descendants. Their birth rate is very high.
So if these 7 / 8 million Arabs were given right or return to Israel and they all came back, then overnight, there would be a Muslim majority.
You saw what happened over in Gaza when there was a democratic election - they voted in Hamas - who wanted to kill all Jews and rejected democracy entirely.
So there's no way any reasonable person could ask for right of return for all these Arabs who's parents or grandparents were once living in Israel.
It would be suicide for Israel and most of the Jews in it.
So anyone suggesting that is not a serious person.