There never was such a place though. And even if the Arabs had won the war in 1948 and wiped Israel out, there still wouldn't be a state called Palestine. That's because Egypt, Israel & Jordan all claimed the territory and saw it, or parts of it, as being part of their country. That's not speculation either. It's well documented and here's the proof if you need it.
In 1948 Jordan controlled the whole West Bank. Did they create a Palestinian state? No. They annexed it. And the Egyptians placed the Gaza Strip under military control.
There has never been, nor would there have been, an independent, sovereign Palestinian state.
And I'm not saying this to support the Israelis or downplay what's happened to the Palestinians. But people have this view that the Jews somehow invaded this peaceful state and kicked the residents out, like the fate so many indigenous people have suffered in other parts of the world. You really have to know the history before you comment because, once you do, you realise there is no simple, black-and-white picture but one with multiple shades of grey and where there are no simplistic answers.