Related to selling property that Palestinians already own: synagogues in Canada and the US lined up to have Jews-only illegal real estate sales of West Bank properties on stolen land earlier this month. Here's a Jewish man talking about why the sales are illegal and how he organized a protest of the one in his town in New Jersey.

To be explicitly clear though - neither Jews nor synagogues as a whole are the problem (as evidenced by the linked conscientious Jewish protester for instance). I'm protesting the behavior of THESE synagogues and Jew-only events the same way I would if evangelical churches were holding white-only sales events of illegal settlements. Racism is wrong, and so are racially-restricted real estate sales (and more so for being on stolen land).