If a piece starts with a flat out lie I stop reading.  The maps at the top are, in fact, a flat out lie.  There has never been a country of Palestine  in the modern worlds.  There was a British occupied protectorate that had about 600000 jews and a million moslems.  The world, in the form of the UN, including the USSR, felt that the best way to deal with the jewish problem was to partition that protectorate into two states.  The jews said yes, the Arab world said no and vowed to finish what Hitler had started.  They lost.  Egypt kept Gaza, and Jordan kept the West Bank.  That is, arab moslems kept the land where arab moslems had been living.  Oh horrors. 

At any time in 20 years from 47 to 67 these Arab Muslim states  could have created a Palestinian state.  But since these countries, like the banks are secretely run by Jews they did not.  In all those years no one clamored for a Palestinian state.  The Arabs, being slow learners, again tried to finish the job that hitler started.  Not wishing their children to go to a place that they had escaped the Jews of Israel did not wait to be attacked but struck first.  They did not attack Jordan, and pleaded with Jordan to not get involved. 

The king of Jordan foolishly believed Nassar of Egypt and attacked Israel.  He lost.  Israel now owned the west bank by right of conquest.

If you are not lazy, you can check all this by reading the history of the relevant times, and reading the newspapers of the relevant years.