Norwegian Muslims were amongst hundreds of people who formed a 'ring of peace' around a synagogue in the country's capital, Oslo.
Over 1,000 people took part in the human chain may chanting "No to anti-Semitism, no to Islamophobia".
The symbolic act comes a a week after a Danish-born son of Palestinian immigrants, Omar Abdel Hamid El-Hussein, killed two people at a free speech event in Denmark.
Zeeshan Abdullah told the assembled crowd: "Humanity is one and we are here to demonstrate that.
"There are many more peace mongers than warmongers. There’s still hope for humanity, for peace and love, across religious differences and backgrounds."
Norway's Jewish community leader Ervin Kohn echoed the sentiment.
He said: "It is unique that Muslims stand to this degree against anti-Semitism and that fills us with hope...particularly as it's a grassroots movement of young Muslims."
Despite passing off peacefully, Norwegian police had been prepared for an incident, deploying gunmen around the building.
Police superintendent, Steiner Hausvik, said: "It has been calm as we expected. We had no reason to expect any trouble but we were prepared."