A Palestinian Christian theologian and pastor of a church in the Holy Land came to New Jersey last week with a message for faith leaders and others: Do something bold to stop the slaughter of civilians in Gaza, or be complicit in their deaths. The Rev. Munther Isaac, pastor of the Evangelical Lutheran Christmas Church in Bethlehem, drew on his own experience of having “canceled” Christmas at his church last year. Forgoing the rituals and decorations of the usually festive holiday that commemorates the birth of Jesus, he delivered a now-famous homily: “Christ Under the Rubble.” “We are angry,” …