You worship that which you don't know. We worship that which we know; for salvation is from the Jews.
for salvation is of the Jews; the promises of salvation, and of a Saviour, were made to them, when the Gentiles were strangers to them; the means of salvation, and of the knowledge of it, as the word, statutes, and ordinances, were enjoyed by them, when others were ignorant of them; and the Messiah, who is sometimes styled "Salvation", see Genesis 49:18, was not only prophesied of in their books, and promised unto them, but came of them, as well as to them; and the number of the saved ones had been for many hundreds of years, and still was among them; the line of election ran among them, and few among the Gentiles were called and saved, as yet.