I remind you that that UN decision called to partition Mandatory Palestine into Jewish and Palestinian states, and that the plan was rejected by the Palestinian side;
As a point of fact, the partition was rejected by both sides- the Arabs and Jews living in the Palestine Mandate.
The only Jewish organisation that agreed to it were the American Zionists who presumed to make deals on behalf of Jews in Palestine,
We know they did not agree to the UN partition because there were numerous paramilitary organisations that objected to the partition and kicked off the Nakba, seizing lands that the UN had designated for Palestine.
the rejection (and continuing Palestinian rejections to adopt the two-state solution, most recently at Camp David)
As another point of fact, the PLO and Israel had both agreed to the two state solution in 1993 with the Oslo Accord. However the agreement did not turn out to be anything other than a way for Israel to continue land grabbing, as by 1995 Israel had taken Area C of the West Bank (70% of total WB land area) and banned Palestinians from 60% of the West Bank. Ilegal settlements were meant to be dismantled, but were instead accelerated. Final negotiations and statehood was supposed to be given no later than May 1999. The Camp David 2000 summit failed because Israel refused to give up the parts of the West Bank they had seized, even though the PLO offered a 1:1 land swap so that Israel could swap uninhabited Israeli land to keep the most populated illegal settlements in the West Bank. In addition, Israel wanted 100% of Jerusalem, but the Palestinians could not agree to surrendering East Jerusalem.
The failure of Oslo and Camp David was due to both sides digging in their heels and a climate of mistrust. Nethanyu was involved in these and once bragged about derailing the Oslo Accord as he is vehemently against a two state solution.
Both sides bear responsibility for the current situation.
Absolutely.