President Abbas has a PhD in holocaust denial.
Calling the PA left wing isn't accurate. It's also bent on the destruction of Israel and the Jewish people.
From Encyclopaedia Britannica:
"The PA was founded following years of hostility. Secret meetings held in Norway in 1993 between the PLO and Israel led to the signing of the historic Declaration of Principles (the Oslo Accords), in which the two sides agreed to mutual recognition and terms whereby governing functions in the West Bank and the Gaza Strip—occupied by Israel since the Six-Day War of 1967—would be progressively handed over to a Palestinian council."
https://www.britannica.com/topic/Palestinian-Authority
PA is controlled by Fatah, which is "centre-left" to "left-wing" per Wikipedia. If you disagree, edit Wikipedia and cite your sources.
You are not understanding what the article is saying, because you're mixing up different Palestinians. Palestine has a left wing party, the Palestine Authority, and a right wing party, Hamas. The Palestinian Authority, led by Abbas, recognizes the state of Israel and wants a two-state solution that also establishes a Palestinian state. Hamas does not recognize the state of Israel and wants to destroy it. Netanyahu is against the Palestinian Authority because he's more against giving legitimacy to Palestinian statehood than he's against war. He funded Hamas to delegitimize Abbas/Palestinian statehood/two-state solution/peace.