John on the Sunset can mis-state history with the best of them.

The Palestinians were being swamped by Zionists from Europe and especially America, and sooner or later would have ended up in the same position they are in now. This massive influx of people and money, especially after WW2, would upset the proposed partition into Jewish and Arab states with Jerusalem internationalized, which the United Nations was attempting to accomplish that in 1947.
Israel declared its independence and the almost immediately following war in 1948 secured over 75 per cent of the land and most of Jerusalem to Israel.
Over half of the Palestinians fled or were expelled. Egypt and Jordan compounded the situation by occupying part of the territory. In the 1967 war, Israel gobbled up these territories, and annexed the rest of Jerusalem. The number of refugees was now some 2 million, a number too large to be absorbed by their Arab neighbors.

The United Nations called on Israel to withdraw, but of course the resolution was ignored. This was followed by further ineffective actions by the UN.

Of the Muslims and few Christians who stayed in the conquered territories, the Israeli government has guaranteed that their representation in the government will always be ineffective.