How disgusting segregation was in the USA in the 1950s but ...?

An article in last week's Spectator (I am way behind with my reading) entitled 'Post-racial America? Forget it' was an interesting read but one little bit really caught my eye:

'Even as late as the 1950s, black people were unable to buy privately owned property in New Orleans, because the white landowners exercised their right not to sell it to them. Those days are long gone...'

Despicable & vile and not that long ago really. A part of American history that most people, especially 'liberals', would look back on with disgust and disquiet.

I wonder how many of the same people would see anything wrong with this from an August post of mine:

'Almost no notice was taken of another pre talks decision that the PA chairman revealed, as he announced clearly that if a Palestinian Authority state is created in Judea and Samaria, no Israeli citizen will be allowed to set foot inside... "I will never allow a single Israeli to live among us on Palestinian land,” Abbas declared. Israel is home to a sizable proportion of Arab citizens, who have the vote and are represented by Arab parties in the Knesset.'

So if segregation in 1950s America was wrong why is creating a Judenfrei Palestine acceptable? 'Is it coz they are Jewish?'