It is my experience that we bring everything we are with us to every endeavor. Sometimes that might include rejecting something we were taught and knowing the reasons why we rejected it. That is part of self-knowledge. Unless you suffer from amnesia you cannot forget any part of yourself, but you can change it and bring that change to everything you do. So Jews who were brought up to believe being Jewish means supporting Israel right or wrong, and have discovered that this is an unethical way of dealing with the world, are still bringing everything they are with them, including this new self-knowledge. Those of us who were taught that Judaism is about ethical living, and not about supporting a "Jewish homeland" are fortunate to be able to bring our Judaism to our work and our lives and still embrace universal values. In reality I bring everything I am to everything I do. my Judaism, my theater art, my journalistic eye and ear, my lesbianism, my motherhood, my rural life, even my love of the natural world and of domestic plants and animals. It's all part of who I am.
Not to confuse anybody, but, after reading this opinion piece, and some of the comments, two thoughts occur to me. One, the author is speaking for herself, which is always appropriate in an opinion piece, but Palestinians are as individual as anyone else, so she can't possibly be speaking for an entire people. Two, though my own mistakes in relating to other people I have learned that telling them what language to use when they speak is the fastest way to turn a friend into an enemy. Personally I use Palestine/Israel sometimes when I am writing, because Palestine came first and it is good shorthand, like LGBTQ. My organization will be discussing this piece at our next meeting.