While most adults in Poland say they are willing to accept Jews as fellow citizens, neighbors and family members, almost one-in-five take the opposite position.
Read a Q&A with Conrad Hackett, associate director of research and senior demographer at Pew Research Center, on estimating the European Muslim population.
The number of Christians in Europe is forecast to drop by about 100 million by 2050, while the share of Muslims and smaller religious minorities will increase.