Israeli-Palestinian Conflict

This is an unbiased history of the Israeli-Palestinian conflict. Most in the U.S. are almost universally against Palestinian violence against Israel and somehow never explicitly critical of Israeli violence against Palestinians. But the left, the real left, is unabashedly supportive of Palestine. And the first paragraph of the background is why:

The Israeli-Palestinian conflict dates back to the end of the nineteenth century. In 1947, the United Nations adopted Resolution 181, known as the Partition Plan, which sought to divide the British Mandate of Palestine into Arab and Jewish states. On May 14, 1948, the State of Israel was created, sparking the first Arab-Israeli War. The war ended in 1949 with Israel’s victory, but 750,000 Palestinians were displaced, and the territory was divided into 3 parts: the State of Israel, the West Bank (of the Jordan River), and the Gaza Strip.

How do you square support for Israel as a state when it's merely an extension of British colonialism, and when Israel seems to actively seek to deny Palestinians any form of autonomy as a policy? Not to mention the numbers of dead on both side after each conflict...