"Daesh (another name for the Islamic State) has become an overt, declared threat to the interests of the United States and to law-abiding men and women across the globe," Kerry said in his keynote address at the Brooking Institute's Saban Forum here.
"And their aggression has fuelled a refugee crisis that is placing an extraordinary burden on our friends in Jordan, Turkey, Lebanon, and now all of Europe with a profound impact on Europe itself," he said.
"That is why President Obama at the very outset, folks, the moment we saw what Daesh was doing and how they were moving and coming into Iraq, he declared that we must defeat Daesh. And that is why we are now increasing the pace of doing so," the top American diplomat said.
President Obama has defined three missions to achieve this goals, he noted.
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The first is to mobilise our partners to accelerate and broaden the international campaign to defeat the terror group. The second is to work diplomatically to bring an end to the Syrian civil war, because every single country consistently from the beginning of the Syrian revolution has said there is no military solution to this, it has to be a political one, Kerry said.
Noting that the urgency of defeating the terror group cannot be overstated, Kerry said the Islamic State are a mixture of killers and kidnappers, smugglers, thieves, and apostates who have hijacked a religion and combined a medieval thinking with modern weapons to wage an especially savage brand of war.
"They butcher teachers, burn books, shut schools, destroy ancient sacred places including the tombs of the prophets Jonah and Daniel," he said.