The United States will eventually have to return to Afghanistan due to the risk of al-Qaeda’s return, Sen. Lindsey Graham (R-S.C.) said on Sunday, adding that the war-torn country will likely become “a cauldron for radical Islamic behavior.” The Republican senator made the remarks during an interview with BBC’s HARDtalk host Stephen Sackur, explaining that since the Taliban has returned to power, terrorist threats coming from the Central Asian nation could increase. “Here’s where we’re at … The Taliban are not reformed, they’re not new,” said Graham. “They have a view of the world out of sync with modern times. They’re going to impose a lifestyle on the Afghan people that I think is going to make us all sick to our stomach.” “But most importantly, they’re going to give safe haven to al-Qaeda, who has ambitions to drive us out of the Mideast writ large and attack us because …