Because that pain, blood, and death are the outstretched hands of Christ on the Cross. Christ’s labor was manifested clearly in the Garden of Gethsemane, when His sweat was like drops of blood falling to the ground; but it started much earlier than that, at the moment of His Nativity, or rather, even at conception.
The Church of St. Alexander Nevsky in Copenhagen was established back in Tsarist times. In fact, Danish Royalty and the Russian Royal House have been closely connected—Tsar Nicholas II's mother, Tsarina Maria Feodorovna, was a Danish princess. Archpriest Nicholas Artemov, who served there from 1987-88, published on the website ROCOR Studies his memoirs of that historical parish.