The allies did not decide that Israel existed in 1948. What a silly thing to say. Israel declared independence in 1948 with no help from the allies who were sure it was about to be annihilated being invaded by 5 countries.
Firstly, there has always been a Jewish community in Israel, always.
Secondly, Jews began immigrating to Israel in the late 19th century. They BOUGHT the land and often settled swamps and other previously uninhabited areas. No one threw anyone off their land.
A Palestinian country has never existed, ever. So I'm not sure what country has been wiped out. Despite the challenges, Israel has flourished over the years.
The Palestinians turned down the peel partition plan. They tuned down the UN partition plan. They turned down any peace deal in Khartoum in 1967. they started the second intifada.
Sure, they may wish that Israel was not the Jewish homeland. But they are just as responsible for their current situation. firing rockets into Israel will not move them along the path to statehood.
It's quite shocking that you are so supportive of Iran! Iran most certainly has threatened many times to annihilate Israel and denies the existence of the holocaust. I guess you sympathize because Israel has stolen Iranian land, oh wait, no it hasn't!