By Tilman Blasshofer and Sarah Marsh FRANKFURT (Reuters) – Eight decades after Raisa Valiushkevych fled Ukraine to escape Nazi Germany’s invasion, the 98-year-old Holocaust survivor found herself fleeing again – this time to Germany, to escape Russian shells falling around her home in Kyiv. Speaking at a Jewish care home in Frankfurt, the retired teacher said it felt strange to have found such a refuge in the land of her former persecutors. But times had changed and she felt grateful and welcome. Valiushkevych is one of around 50 Holocaust survivors that Jewish organisations have helped evacua…