Q: What, if anything, is incorrect with this statement?
“Our celebrant (presider) at this liturgy is Jesus Christ.”
A: Well, sign me up for that parish!
No, the celebrant/presider is always a human priest, and one should not confuse him with Jesus Christ.
GIRM 2 quotes SC 47: “At the Last Supper, Our Savior instituted the Eucharistic Sacrifice of his Body and Blood, by which the Sacrifice of his Cross is perpetuated until he comes again; and till then he entrusts the memorial of his Death and Resurrection to his beloved spouse, the Church.”
Jesus died on the cross. He oversaw the Last Supper. He entrusted the memorial of his sacrifice to the Church. With a priest, we participate again and again in his one sacrifice.