The Nazis did many things but are known primarily for their most evil deeds - the terms "fascist" and "Nazi" have deep, profoundly negative connotations. Saying "the Israelis are like Nazis in this narrow sense" doesn't get you brownie points - you're still doing reductio ad hitlerum.
Hitler was also a vegetarian and antivivsectionist - should we thus compare PETA to Hitler? The Nazis were eugenists as was Margaret Sanger - should we thus compare Planned Parenthood to Nazis? The National Socialist Party was initially anti-big business and anti-capitalist - do we thus compare the Occupy Movement to Nazis? The Nazis wore armbands with a cross on it as does the Red Cross - are the Red Cross then Nazis? This can go on and on.
Being compared to Nazis, for better or worse, is shorthand for unmitigated evil. Feeling the need to compare the greatest victims of the Nazis to Nazis says something about you, not the Israelis.