Because Russia has Putin. It's his way, or GTFO. He's already openly said that Russia doesn't need Muslim refugees - Muslim refugees need Russia. If Europe had the same viewpoint, the influx of refugees would have been controlled, the refugees/migrants would happily integrate (because the threat of being deported would be too strong if they didn't) and everyone would get along swimmingly. Unfortunately, Europe has this big yellow "don't want to branded an Islamophobe" stripe running down its back.