According to Catholic scholars, why did Jesus relate His ensuing Passion and Glorification to the visit of the Greek?

We read in [John 12: 20-24 (NRSVCE)](https://www.biblegateway.com/passage/?search=John%2012&version=NRSVCE) : >Now among those who went up to worship at the festival were some Greeks. They came to Philip, who was from Bethsaida in Galilee, and said to him, “Sir, we wish to see Jesus.” Philip went and told Andrew; then Andrew and Philip went and told Jesus. Jesus answered them, “The hour has come for the Son of Man to be glorified. Very truly, I tell you, unless a grain of wheat falls into the earth and dies, it remains just a single grain; but if it dies, it bears much fruit. One is intrigued by the reference Jesus makes to his ensuing Passion and Glorification in answer to the visit of the Greeks and their request for a rendezvous with the Lord. My question therefore is: According to Catholic scholars, why did Jesus relate His ensuing Passion and Glorification to the visit of the Greek?