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No - it's not because they specifically support the settlers. But because they don't give a fuck. The Palestinians are far too small in number (and most especially political clout) for them to make any accommodations for. Especially if it upsets public opinion in that larger (and infinitely stronger) country they have the misfortune of being surrounded by.
There's nearly 4 million Palestinians in Gaza & the West Bank, and about 7.15 million Jews in Israel. By contrast, there are 450,000 Israeli settlers in the West Bank, and 9,000 settlers in Gaza.