The incidents are among the first manifestations of antisemitism in Europe connected to recent escalations in the Israeli-Palestinian conflict.
Felix Klein urged authorities across Germany to bar protesters from using the symbol, saying it relativizes the Holocaust.
The number of antisemitic crimes reported to police across the country rose to 2,351 from 2,032.
The city of Dusseldorf has agreed to return an Expressionist painting estimated to be worth $18 million.
Germany used its influence on the E.U. to bend the rule that a European-produced vaccination would be given first to European countries.
The German leader spoke at a celebration marking the 70th anniversary of the country’s Jewish umbrella organization.
“Open anti-Semitism was not unexpected at this demonstration,” tweeted the Berlin office of the American Jewish Committee.
The campaign is being billed as the first-ever digital campaign by survivors.
The Simon Wiesenthal Center’s chief Nazi hunter called the sentence a travesty.
Sascha Krolzig will serve a six-month sentence for threatening a Jewish leader after his final court appeal was denied.