I remember being taught when I was younger that the fact that Jews are around is a testimony to the eternity of our religion; that we survived them all and that they are no longer.
I am unaware (probably in ignorance) of a source in chazal that justifies this teaching. Perhaps the "v'hee she'amdah" of the haggadah bares resemblance: "that which stood for our forefathers and us, that not only one (nation) stood up against us to destroy us. Rather in every generation and generation they stand against us to destroy and Hashem saves us from their hands".
But is there a more direct source?