My thanks to James McGrath for pointing me to this interesting article in the NYT. Notice the multiple levels of typology present. The Exodus is linked in cultural memory to the Shoah (Holocaust), but there is still a need for mnemonic reinforcement. Notice also that it is an external memory cue that functions as the artifact of memory. In other words, the tattoo serves as way to extend memory from autobiographical remembrance to cultural commemoration. This is a topic of central interest in my research on memory and typology in the Gospels.
But this article is worth a read for several reasons. Like a good friend of mine says: "Until the Holocaust means as much for Christians as it does for Jews, we must continue to talk about it."