Hundreds of thousands have lost everything without compensation. Where is the justice in that. If your God promised this land to you, is that how he intended you to have it? What kind of God is that?

Responding to this separately...

There is no justice in those folks having lost everything without compensation. There is no justice in the literally one million people who died in the Partition of India, either - or the 14 million who became refugees because of it. The decolonization of the former Empires wreaked massive havoc on all of the people who lived in those areas, whether the British or Ottoman Empires - and none of the people who suffered during those times deserved it. By the time WWII ended, roughly a third of the population of the Mandate was Jewish and two-thirds was Arab - which is why the UN decided to partition the Palestinian Mandate.

That alone would have been traumatic even if it had gone according to plan (again, see the Partition of India). But instead, the area erupted into open warfare, when the Arab League nations declared war immediately and all collectively invaded the area - and decided to take all of the lands allocated to the Arab state for themselves. There were about 400,000 Arabs living in the area that was to be the Jewish state, and 800,000 Arabs living in the area to be the Arab state - so the Arab League invasion and territorial seizure inarguably contributed to the immiseration and dislcation of huge swatches of that population. Abdullah I has a lot to answer for (or would - he's been dead for quite a long time now).

I don't believe G-d promised the land to the Jews. Rather, I believe that the Jewish people have the same rights to demand self-determination and governmental autonomy as any other people that are indigenous to an area after the pullback of the imperial powers that formerly governed them. The Jewish people in Palestine in 1947, at the end of the Mandate, had the same rights to form a government and a nation as the Palestinian people. Not based on biblical edict or divine right, but based on their status as an indigenous ethnic group and the lawful approval of the Partition plan by the UN. The Israeli forces had no right to attack any Palestinian civilians and/or drive them from their homes, and the Arab League nations had no right to invade Israel and try to kill or expel every Jew living there.