GeorgeH didn't say that *Israelis* invoke the Holocaust to excuse their treatment of Palestinians. He said that *Jews* consider the Holocaust justifies them perpetrating evil to others.
Be that as it may, he cannnot point to any *relaible sources* for such a statement because none exist.
I will grant you that he may find something along those lines emanating from a Jewish or Israeli extremist group like Kach. But, you should be aware that Kach has been banned in Israel as a hate group.
If you try to use a Kach statement as representative of Jews or Israelis, it's like saying the KKK is representative of Christians or Americans. Not credible except to propagandists whose aim is to destroy the legitimate aspirations for peace that are held by both sides of the divide.