I was at an ecumenical seminar on teaching hymnology, and the presenter, a Calvinist professor, was talking about theology in hymnody. He singled out Gather Us In as a hymn that would give no offense to anyone, atheist or B’ahai or whomever. A Buddhist could comfortably sing this song. He looked directly and rather accusingly at me, the only Catholic in the seminar, and asked whether it didn’t seem strange that currently in the Roman Catholic Church the single most popular hymn does not mention God the Father, God the Son, or God the Holy Spirit, or the Holy Trinity in general, and could be comfortably sung by all the participants at any interreligious gathering.
On one hand context is everything. On the other, lets keep in mind that Catholics also consume the Eucharist just like it were drink and food. Imagine all the billions of non-Catholics who eat bread and drink wine every day and have no idea!