Washington Post about Muslim refugees in Germany being anti-Semitic

Look at this long story: the evidence for the claim about an anti-Semitic problem of the Syrian refugees is one person.  This is what is called documentation.  This is exactly the same tactics that anti-Semitic rhetoric is all about: when you take one Jewish person as an example for world Jewry.  Here, one Muslim person represents not only all Syrian refugees but all of Islam.