How to say "being" as in "Being jewish"
I think the word you're looking for is 作为

in the capacity, character, or role of; as
作为你的朋友，我得劝劝你
As your friend, I have to give you some advice
你作为领导，就要以身作则
As a leader, you should set a good example for others -A Chinese English Dictionary

This is basically the equivalent of as in English - which I think is what you're looking for with 'being'.
being Jewish 作为一个犹太人
being American 作为一个老美
being Christian 作为一个基督徒