I don't understand why you refer to Dr. Boorstein as a Jewish-Buddhist teacher when she teaches Dharma, not Torah.
You won't find Metta meditation in the Torah (specifically the last of its four parts), and you won't find God, revelation before a multitude, a God-given code of ethics, commandments by which a person and nation can become holy, or a covenantal relationship between God and a specific nation, in Vipassana (insight) Buddhism.
She's a very fine Buddhist teacher. But she's not qualified to teach Judaism, and in my experience she teaches things that are antithetical to Judaism.
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