I realized that the area around Bet Shean in Israel is mapped not detailed enough. Seems like nobody after the publishing of the BING satimages has tagged this area.
I have fixed several main "fixme" streets and added as much as I could see with the help of Bing to OSM.
The focus was on the water basins and the farmlands in this area.
Now it looks more "green" and "blue".
I also removed several forests in that area that are mapped more detailed with the KKL Import.