what the heck is a “spiritual descendant?”
God gave Israel to the Jewish people not the Catholics. But conversion is always available if you really want it.
The Catholic record of treating Jews in Europe is terrible (see 3/12/2000 Pope John Paul Mass of Pardons). Humility and contrition would suit you better.
I could give you a very long dissertation on how the gift to Abraham was the part of a covenant, how that covenant was broken and how Christ represents a New and Everlasting covenant. I could cite numerous New Testament passages that equate Greek (Gentile) and Jew but that would still require a missing component of faith from you. Your mind and heart are closed so no further dialog is possible. Suffice it to say that the Pope has as much, in not more, legitimate right to advise and chastise the secular government of Israel than non-Israeli Jews.