The UN, which includes the HRW, have a historic bias against Israel that is an ongoing topic. They admitted so themselves in the past and have been called again and again to justify their strong bias that shows, among other things, in the fact they find the majority of all human rights offenses in Israel.

The focus on Israel from the UN stems form the fact that the majority of it's members states are anti-democratic and their council is dominated by oil states and muslim states who see Israel as a thorn into their side.

While I wouldn't call everything from the UN as propaganda, they are definitely not a neutral source for information.