So why does he also state, I deeply hope to contribute to the progress of the relations that Jews and Catholics hold since the Vatican Council II, through a spirit of renewed collaboration put to the service of a world more and more in harmony with the will of the Creator. (emphasis mine)
Can you not see a reconciliation of Jews to Jesus? Even the Apostle Paul speaks of it. It may yet be distant. And their doctrine will still be now against that of Christ, but that doesn’t mean bridges should not be built. It certainly should mean that pledges of no harm would be made.
But if we, seeing them far, wish to bring them near, a pledge to treat each other with respect would be a good start. St. Paul is all about giving honor when honor is due. Everyone is "due" a cooperative spirit and a genuine appreciation, especially if this can build bonds which facilitate peace and a closer walk with Our Lord.