Appointments to the US National Security Council don't require Senate confirmation, but they do require Israeli confirmation

And there is also this--in addition to the vote of confidence from Israel's ambassador:  “Her views came out of the political and cultural environment she was in at the time,” said Abraham H. Foxman, the national director of the Anti-Defamation League. “But that’s in the past. She’s matured and moved on, and I look forward to working with her at the U.N.” (thanks Sultan)