Just to be clear: leaving aside the sarcasm, of course Mary is an embodiment of Israel's ideal of purity and the fruit and high point of the Nation of Israel. My laugh was at the oligophrenic desire to substitute "Israel" for "mother of Christ" in order to deny Mary's presence in that chapter. Yes, that was my assumption, and you express it succinctly and with grace as "of course Mary is an embodiment of Israel's ideal of purity and the fruit and high point of the Nation of Israel."