Are you kidding me? Showing a UN map which holds results from the Palestinian British mandate period?
And you claim to know your history? The part you are refering to and claiming your arguments on is merely a drop of the full bucket.
You assume this landnicking game started out in 1946 or somewhere close then you don't have a clue what you're talking about.
This goes back beyond Christ yet the majority of the pro-palstinians here just pick the date that suits the best for them and just wipe out facts that are quite important in the whole to have a proper opinion.
First i recommend you to look up what a 'palastine' was in the time of the British Mandate, ill give you a hint : there were also Palestinian Jews, which were reffered to as Palestine, but in fact were just Jew.
Because your definition of a Palestine is clearly not a Jew you're already wrong with your very first assumption.
This is so much more complicated then most of the people, who think to have a founded opinion on this, can possibly imagine.