The Nintendo Wii hardware is region-free — a US console will power on and function in Israel with the correct power adapter (Israel uses 230V, Type C/H/M plugs; US Wii expects 120V). You'll need a step-down voltage converter or an Israeli power supply.
Wii game discs are region-locked. A US Wii only plays NTSC-U/C region games. Israeli retail games are typically PAL region (Europe/Australia) and will not work on a US console without modification.
The Wii Shop Channel and Nintendo Wi-Fi Connection services were discontinued in 2019. Even when active, they were region-segregated — a US Wii could only access the US store.
US games default to English/Spanish/French. Hebrew support is rare in NTSC-U releases.
Recommendation: For hassle-free gaming in Israel, purchase a locally sold Wii or Wii U with PAL region games.