I have never heard of "jewish evangelism" Jews do NOT try to convert others. It doesn't exist. Conversion to Judaism is an extremely lengthy process to ensure only those who truly believe will convert.
And like other people have said, once you believe that Jesus is the messiah, you no longer are recognized as a Jew, but rather a Christian. Jews for Jesus are ethnicially Jewish, but have essentially renounced their Judaism.
it is absolutely a 100% Christian denomination. The whole point is to try to convert Jews into Christians.
-Rissa