Give the fellow a chance ... he is not espousing racist or anti-Semitic sentiments but almost sounds like an Orthodox Jew lamenting the diminishing of his religion, in America at least, due to intermarriage.
He’s right, by the way. A Jewish family, neighbors to mine, had four children. Three married non-Jews; those seven children are not Jewish by religion. Only one married a Jewish woman and is raising his children in the faith.
Me? I’m a Christian, and I have been telling my children since they were small that while their friendships should be with everyone, they should observe that key passage in the New Testament, “do not be differently yoked.” The reference is to oxen but the caution is against intimate friendships or relationships, meaning marriage, business partners, etc. Meaning, live in a mixed neighborhood by all means but marry a Christian. Do business with everyone but, when looking for a business partner, select someone with your Christian character.
Yes. I am also a Christian but I love the Jewish Faith and Israel. I know of Jews who married non-Jews and raised their children in a secular home abandoning the Faith.