Poland's Foreign Ministry said Monday that it strongly condemns racist, anti-Semitic and xenophobic ideas, and insisted that a large weekend march by nationalists in Warsaw was largely an expression of patriotic feeling.
The ministry said the march Saturday on the Independence Day holiday was "a great celebration of Poles, differing in their views, but united around the common values of freedom and loyalty to an independent homeland."
The event was organized by groups that trace their roots to radical nationalist pre-World War II anti-Semitic groups. About 60,000 people took part, including families.
But there were also young men carrying banners with messages including "White Europe of brotherly nations."
Some carried the Celtic Cross, a white supremacist symbol, and there were reports that people chanted slogans against Jews and had anti-Islam banners.
Police detained 45 counter-protesters who blocked the march's path, but didn't act against any of those expressing extremist views.
On Monday, a small group of civic rights activists protested what they saw as the authorities' failure to respond properly to the behavior of the nationalists. In a rally in front of city hall they chanted, "Warsaw free from fascism!" One man held a banner saying, "Poland, wake up. Fascism is coming." They then proceeded to a police station to protest there too.
Israeli Foreign Ministry spokesman Emmanuel Nahshon called the event "a dangerous march of extreme and racist elements."
"We hope that Polish authorities will act against the organizers," Nahshon said in a statement. "History teaches us that expressions of racist hate must be dealt with swiftly and decisively."
The Polish Foreign Ministry said it wasn't justifiable to define the march based on some "incidental" elements. Underlining its opposition to extremism, the ministry recalled that it had opposed a visit to Poland by Richard Spencer, the leading American white nationalist.
Spencer was originally to have attended a conference in Warsaw a day before the march, but he was taken off the schedule after the ministry said it didn't want him in the country.
The American Jewish Committee, a global Jewish advocacy organization, also urged the government to act. It cited reports that masked participants had chanted , "Sieg Heil" and "Ku Klux Klan" as well as "Pure Poland, white Poland" and "Clean blood, lucid mind."
Agnieszka Markiewicz, director of AJC's Warsaw Central Europe office in Warsaw, said the holiday "was seriously marred by hateful, far-right throngs that threaten the core values of Poland and its standing abroad."