It is nothing of the sort.
While Palestinian terrorism had originally traditionally skewed far to the Left, with the most spectacular terror attacks of the 1960s and 70s coming from socialist organizations like the PFLP and its offshoots, the vast majority of Palestinian society is not interested in socialist ideals.
A new poll from the JMCC asked Palestinians about what should govern the Personal Status Law, and 72.3% of respondents said it should be based on Islamic Sharia.
More directly, the survey asked Palestinians which political party they would vote for in legislative elections. All the socialist parties combined - the PFLP, DFLP, PPP, FIDA - gather just 2% of the support of Palestinians.
The socialist Left is excellent at propaganda. They excel at making it appear that they have a groundswell of popular support. The entire concept of basing BDS on the call of "Palestinian civil society" which sounds very impressive while no one realizes it is on the fringe of Palestinian society as a whole is brilliant.
But when you support Palestinians, you are supporting people who show time after time that they support the most regressive positions in regards to social justice issues.
Here is an infographic I made in 2013 based on a Pew poll that shows the side of Palestinian society that the Western media ignores.