Why can't my Protestant brothers and sisters receive Holy Communion in the Catholic Church? Wouldn't that be a sign of Christian unity?
The reason we have the Week of Prayer for Christian Unity and ecumenical dialogue is that Christians are not unified. The Great Schism began the first major division or "disunity" and the Protestant Reformation was the second. There have been smaller and larger divisions along the way to this day.
The reception of Holy Communion is the clearest sign and symbol that we are in unity with our Lord, the Church He founded and those He has placed to guide and lead His Church, namely the Pope and bishops who are the successors of St. Peter and the other apostles. Complete unity, which receiving Holy Communion implies, is that we believe the same things as well, not only about the Most Holy Trinity, but also about Sacred Scripture and Tradition, the seven sacraments and Christian morality. Orthodoxy in other words (right teaching) must always lead to ortho-praxis or (right practice) of the Faith.
We are far from the unity that being one in Christ implies. Being one in Christ implies being in Full Communion with Him, which receiving Holy Communion is the clearest sign. Therefore let us pray for the full, visible and corporate unity that our Lord desires. Let us not make Holy Communion a gimmick to make it look like we are unified. Your thoughts?