Who's turning whose back on Whom?
Well, in Mass in the last 40 years, doesn't the priest have his back turned to the Blessed Sacrament? That is, if the Blessed Sacrament is still behind the altar.
And if the Blessed Sacrament has been hidden away in a chapel to the side, in the back or even outside the church, don't the members of the congregation all have their backs, or at least their sides, to the Blessed Sacrament?
Something to think about, no?
By the way, the illustration above is from www.perpetual-adoration.org