BERLIN (JTA) — Last year, as Rabbi Rebecca Blady approached the first anniversary of the Yom Kippur attack on a synagogue in Halle, Germany, she knew she wanted to commemorate it on her own terms.

Josef Schuster, the president of the Central Council of Jews in Germany, said it was “scandalous” that there were no police outside the Halle synagogue on Judaism’s holiest day, when ...