UN Secretary-General Antonio Guterres made the comment to reporters after talks with Saudi King Salman, Crown Prince and Interior Minister Mohammed bin Nayef, and Deputy Crown Prince Mohammed bin Salman.
“One of the things that fuel terrorism is the expression in some parts of the world of Islamophobic feelings and Islamophobic policies and Islamophobic hate speeches,” Guterres said at a joint news conference with Saudi Foreign Minister Adel al-Jubeir.
The jihadist group has also claimed deadly attacks in Saudi Arabia and in Europe.
Anti-immigration politicians including France’s Marine Le Pen have seen their popularity rise after an influx to Europe of migrants, many of them Muslims fleeing wars in Syria and elsewhere.
But the order has faced obstacles and on Thursday an appellate court decided unanimously to maintain a block on Trump’s order.
Syria’s conflict has created 4.8 million refugees and killed more than 310,000 people since it began with anti-government protests in March 2011.
A new round of UN-sponsored peace talks is scheduled for February 20 in Geneva.