Jewish Buddhism

I was talking to my friend earlier and she brought up the fact she has a friend who is a Jewish Buddhist. I thought she was talking about someone ethnically Jewish but religiously Buddhist, but she insisted they were both ethnically and religiously Jewish but also practiced Buddhism.

She explained that her friend believed in one singular sovereign divine God, our God, from the Torah and how she participates in Jewish religious and cultural life (Shabbat, holidays, Bar/Bat Mitzvah, etc). However, she also explained how her friend meditates, believes in reincarnation, believes in karma, and practices other traditional Buddhist practices. I assume her friend is practicing some sort of non-theistic spiritual or humanistic Buddhism, but even then, that seems a bit contradictory.

I also asked if she was agnostic or atheist, and I was told the friend is neither and does believe in God as described in the Torah.

I’m curious if this is common in certain groups or communities or anything anybody has heard of before because I feel like it is inherently contradictory from a theological and philosophical viewpoint. No judgment toward anyone, just curious to learn more.