Germany is an exception to that rule, I was actually thinking about putting a qualifier in my earlier statement. The other nations surveyed however, especially Holland, are doing very little to protect Jews from Muslims. France is by far the worst, but it wasn't included in this survey.
Those aren't always Muslims. For example, when the cornerstone for the new synagogue in Munich was laid a few years ago a militant neo-Nazi group planned to commit a bomb attack during the ceremony. Fortunately, the plot was uncovered in time by the police... this could have become ugly, especially because then-President Johannes Rau was also scheduled to attend the ceremony.
I guess you could consider it great luck that most neo-Nazis have the will, but lack the intelligence to succesfully carry out a terrorist attack (so far).