Kerry visited the Zaatari refugee camp, which houses 115,000 Syrians who fled their homeland due to the now more than two-year-long civil war there, The Washington Post reported. So far, almost 100,000 people have died in the conflict in Syria, with no end in sight.
At the camp, refugees told Kerry they were angry that foreign powers have not set up a no-fly zone or protective humanitarian zone inside Syria.
"They are frustrated and angry at the world for not stepping in and helping," Kerry said afterward.
When asked why the United States has not stepped up to help more, Kerry said: "I think that President [Barack] Obama has made certain that the United States of America is doing a huge amount here, and the American people should be very proud of the amount of their contribution to what is happening here. It's the largest in the world."
Kerry also voice concern about reports of fighting between factions of the opposition in Syria.
"It is very unfortunate and very sad to see that the opposition is not in agreement," he said. "People are being slaughtered. Women are being raped. Everyone looks at what the opposition is doing and then forgets the crimes of Bashar al-Assad."