The women's protest on Rosenstrasse between commemoration, idealization, and debate

For years now, there has been a controversy amongst historians about whether the intermarried Jews imprisoned at Rosenstrasse, Berlin, in 1943, were released due to the protest of their non-Jewish spouses or if the Nazis had in fact never intended to deport them. What was the Nazi view on mixed marriages and why were the Jews and 'mischlinge'released from Rosenstrasse?