"They can't beat us on the battlefield, so they try to terrorise us into being afraid, and changing our patterns of behaviour, and panicking, and abandoning our allies and partners, and retreating from the world.
"As president, I will not let that happen."
He said it is "absolutely false" that "we are somehow at war with an entire religion".
"The United States could never be at war with any religion because America is made up by multiple religions. We're strengthened by people from every religion, including Muslim Americans. So I want to be as clear as I can on this - prejudice and discrimination helps [Isis] and undermines our national security."
Obama's strong words came after criticism for his response to the recent terror attacks in France and Lebanon, in which hundreds of people were killed and injured.
-nzherald.co.nz