I doubt that Jewish refugees led to an increase in rapes. Black and Muslim refugees, however, tend to rape a lot.
New York Times:
On Perilous Migrant Trail, Women Often Become Prey to Sexual Abuse
…Interviews with dozens of migrants, social workers and psychologists caring for traumatized new arrivals across Germany suggest that the current mass migration has been accompanied by a surge of violence against women. From forced marriages and sex trafficking to domestic abuse, women report violence from fellow refugees, smugglers, male family members and even European police officers. There are no reliable statistics for sexual and other abuse of female refugees.
Among the more than one million migrants who have entered Europe over the past year, fleeing war and poverty in the Middle East and beyond, men outnumber women by more than three to one, United Nations statistics show. “The men dominate, numerically and otherwise,” says Heike Rabe, a gender expert at the German Institute for Human Rights.
Susanne Höhne, the lead psychotherapist at a center in west Berlin specializing in treating traumatized female migrants, says that almost all of the 44 women in her care — some barely adults, some over 60 — have experienced sexual violence.