If this was an independent study conducted by a prominent university with comprehensive peer academic review, then the news would be very positive and joyful to hear. I just don't trust studies organized and sponsored by organization trying to prove their worthiness to their donors. It happens all to often when an organization pays a professional researcher to design a study to prove a hypothesis and not test it with unbiased study.
UN experts: North Korea continues to evade UN sanctions (AP)
from the article: Birthright alumni found less likely to marry non-Jews