In the paragraph you are referencing, Fr. Spitzer is not discussing the Eucharist (at least not directly).
What he’s referring to is the Sacrifice at Calvary & the Jewish Passover.
In Jewish theology, the every time the Passover Seder takes place, the family is being “folded” in time in order for their Passover to take place with the first Passover. In other-words, the modern Passover isn’t symbolic nor is it a redoing of the Passover. Instead, space and time are being altered (in a way that breaks General Relativity) for every single Passover Seder throughout time to take place at the same time as the original Passover in Egypt.
In a similar way, every time the Sacrifice at the Altar takes place at Mass, it’s being linked to Jesus on the Cross. Because we do not re-sacrifice Christ at every Mass, nor is it symbolic. Instead, space and time are being “folded” so that every time the Body and Blood of Jesus Christ are being consecrated at Mass, it’s happening with Christ’s sacrifice.
However, the Jewish theology of “time travel” is very specific, which is why the liturgy of the Seder calls for the children and father to talk about the Seder in the present tense and not the past tense.
Anyway… that’s what Father is talking about here. There is a talk from Dr. Scott Hahn where he discusses this with further detail.
I can’t remember which one it is, but it’s one of the following four talks (all 4 are awesome):
Well-known Catholic theologian Dr. Scott Hahn explains Christ's Paschal Sacrifice on the cross as the fulfillment of the traditional fourth cup used in the celebration of the Jewish Passover meal.
www.lighthousecatholicmedia.org
Based on his best-selling book, Dr. Scott Hahn reveals the early Christians' key to understanding the Mass: the Book of Revelation.
www.lighthousecatholicmedia.org
Spoken as He suffered the agony of the cross, the seven last sayings of Christ recorded in the gospels have been the subject of prayer and inquiry by Christians for two thousand years.
www.lighthousecatholicmedia.org
Once a militant opponent of the Catholic Church, Dr. Scott Hahn highlights the key misunderstandings people have about the Eucharist.
www.lighthousecatholicmedia.org
God bless