Yes. I've lived in this country since birth (1966) and I also visit Israel in most years for work or as a tourist. In my experience the level of concern about Corbyn within the UK Jewish community is far, far greater than in relation to any previous party leader, and in my view this is for good reason.
There are undoubtedly serious issues in relation to how the Israeli government has treated Palestinians. I think most UK Jews would acknowledge this, as would many Israelis. However, the way in which Israel is singled out for criticism is very hard to explain (other than by reference to anti-Semitism) given that many of these critics, and the organisations they support, don't just object to the policies/activities of the Israeli government but also deny Israel's right to exist.
More fundamentally, however, is the fact that many of the comments by Labour politicians and candidates which are regarded as anti-Semitic have nothing to do with Israel and much more to do with longstanding and deep-seated 'worldwide Jewish conspiracy' theories. These views exist on both sides of the spectrum spectrum. One reason the UK Jewish community is concerned about Corbyn, however, is that he repeatedly and explicitly insists on equating anti-Semitism with 'all forms of racism'. I agree that any form of racism is unacceptable, but the nature of anti-Semitism is fundamentally different - it's about hatred, not discrimination. Corbyn's unwillingness or inability to understand this is why the Labour Party has been so slow to deal with the issue, which in turn is why the Jewish community has an unprecedented level of concern about him.
Jonathan