The Pew study found 6.8 million American Jews, 25% more than the 2001 National Jewish Population Survey which found 5.2 million, but these are self-definitions with widely varying ideas about what it means to be Jewish. 1.3 million children
The Pew study showed that 44% of married Jews are married to a non-Jewish person and the current rate of intermarriage is 58%. It is 71% if you take the Orthodox out. Two-thirds of Jews do not belong to a synagogue, one-fourth do not believe in God and one-third had a Christmas tree in their home last year.