NEW YORK: - Foreign Minister Shah Mahmood Qureshi has warned the United States against withdrawing its troops from Afghanistan before the Taliban are defeated, saying if the US forces retreated from the war-torn country, the militant group would soon turn its sights again on Islamabad. "This will be disastrous," Qureshi was quoted as saying by The Wall Street Journal as the Obama administration rethinks its Afghan strategy amid growing calls for a pullout from Afghanistan where the American troops are under heavy pressure from the Taliban fighters. The Journal used the Pakistani foreign minister's arguments in favour of U.S. finishing the job in Afghanistan in its editorial on Thursday that supported his views on the matter. "You will lose credibility. . . . Who is going to trust you again?," Qureshi asked. As for Washington's latest public bout of ambivalence about the war, he added that "the fact that this is being debated whether to stay or not stay what sort of signal is that sending?" The Journal said Qureshi also sounded "incredulous" that the U.S. might walk away from a struggle in which it has already invested so much. "If you go in, why are you going out without getting the job done?," he asked. "Why did you send so many billion of dollars and lose so many lives? And why did we ally with you?" The editorial called the foreign minister's "fair", noting that they remained so far unanswered by the Obama Administration. As for the consequences to Pakistan of an American withdrawal, the foreign minister noted that "we will be the immediate effectees of your policy." Among the effects he predicts are "more misery," "more suicide bombings," and a dramatic loss of confidence in the economy, presumably as investors fear that an emboldened Taliban, no longer pressed by coalition forces in Afghanistan, would soon turn its sights again on Islamabad. Backing his views, the editorial said, "Mr. Qureshi's arguments carry all the more weight now that Pakistan's army is waging an often bloody struggle to clear areas previously held by the Taliban and their allies. Pakistan has also furnished much of the crucial intelligence needed to kill top Taliban and al Qaeda leaders in U.S. drone strikes. But that kind of cooperation will be harder to come by if the U.S. withdraws from Afghanistan and Islamabad feels obliged to protect itself in the near term by striking deals with various jihadist groups, as it has in the past. "Pakistanis have long viewed the U.S. through the lens of a relationship that has oscillated between periods of close cooperationas during the war against the Soviets in Afghanistan in the 1980sand periods of tension and even sanctionsas after Pakistan's test of a nuclear device in 1998. Pakistan's democratic government has taken major risks to increase its assistance to the U.S. against al Qaeda and the Taliban. Mr. Qureshi is warning, in so many words, that a U.S. retreat from Afghanistan would make it far more difficult for Pakistan to help against al Qaeda".