Steve Schwartz enquires as to Kundry's Jewish background.

As a woman who saw "Him" (Christ) on his way to crucifixion and mocked him,
she is condemned to wander the world in search of salvation.  Aside from
the trivial forensic likelihood that she was therefore semitic, Christ's
curse links her specifically with the figure of the Wandering Jew - a
lifelong fascination for Wagner, who earlier examined the character in the
guise of The Flying Dutchman.

Christopher Webber,  Blackheath, London,  UK.
http://www.nashwan.demon.co.uk/zarzuela.htm
"ZARZUELA!"