Conversion to Judaism is a difficult task. Particularly conversion to Orthodox Judaism. Most people don't realize just how difficult it is if they attempt it.
It requires years of study. A mastery of written Hebrew is required. Becoming knowledgeable in both halacha and minhag. Above all the learning, you must demonstrate to the satisfaction of a board of rabbis that you're converting for the right reasons. Not just because you're seeking some new ethnic status.
Celebrities often expect to be shown the express-lane process by virtue of their fame. Madonna is just one such example. She expected to be welcomed with open (golem like) arms into the faith and be shown all the "secret books" of Kabala.
Rather than pursue any serious study, she started treating Judaism as a stage prop and even incorporated objects of Jewish worship (such as Tallit and Tefillin) into her act.
When people are rejected in their attempt to convert to Judaism for whatever reason, they often become quite hostile to the faith.
I have no doubt that Ms Goldberg attempted conversion at some point and found the process too difficult and was rejected. This would explain her hostility towards Jews.