[deogeo]

That is correct, at least in regards to how the statistics were gathered:

"To ensure that we did not overlook religiously unengaged Jews, we asked students for their religion and whether they considered themselves Jewish aside from religion; then, we asked about their parents’ religious identities. Students who considered themselves Jewish in any way were counted in our estimates." -- https://ejewishphilanthropy.com/how-many-jewish-undergraduat...

"Jewishness in the United States is considered an ethnic identity as well as a religious one." -- https://en.wikipedia.org/wiki/American_Jews#Religion