I'd say it has more to do with the very Jewish concept of chutzpah. According to Wikipedia, the term is used "to describe someone who has overstepped the bounda

I'd say it has more to do with the very Jewish concept of chutzpah. According to Wikipedia, the term is used "to describe someone who has overstepped the boundaries of accepted behavior" and "Chutzpah amounts to a total denial of personal responsibility, which renders others speechless and incredulous". The term used to have a very negative connotation, but interestingly, Google says "usually used approvingly". It seems to fit pretty well the descriptions of the "rudeness" and "boldness" in common Israeli culture.