Bangladesh, Nov. 8 -- New York, Nov. 8 (Xinhua/UNB) -- UN Secretary-General Antonio Guterres on Thursday warned against the danger of bringing extremism into mainstream politics across the world.

"In their quest for power, some political leaders are cynically bringing the loathsome views of extremist groups into the mainstream," Guterres told an event marking the 81st anniversary of Kristallnacht at the Museum of Jewish Heritage in New York City. "We see this in authoritarian regimes and liberal democracies alike."

Kristallnacht (Crystal Night), or the Night of Broken Glass, was a pogrom against Jews throughout Nazi Germany on Nov. 9-10, 1938.

"Decades after the Holocaust, the world's oldest hatred (of anti-Semitism) is still with us. ...