US Vice-President Joe Biden has accused America’s key allies in the Middle East of allowing the rise of the Islamic State (IS), saying they supported extremists with money and weapons in their eagerness to oust the Assad regime in Syria.

America’s “biggest problem” in Syria is its regional allies, Biden told students at the John F. Kennedy Jr. Forum at the Institute of Politics at Harvard University on Thursday.

“Our allies in the region were our largest problem in Syria,” he said, explaining that Turkey, Saudi Arabia and the UAE were “so determined to take down Assad,” that in a sense they started a “proxy Sunni-Shia war” by pouring “hundreds of millions of dollars and tens of thousands of tons of weapons” towards anyone who would fight against Assad.

“And we could not convince our colleagues to stop supplying them,” said Biden, thus disassociating the US from unleashing the civil war in Syria.

“The outcome of such a policy now is more visible,” he said, as it turned out they supplied extremists from Al-Nusra Front and Al-Qaeda.

All of a sudden the regional powers that sponsored anti-Assad rebels awakened to the dawn of a major international security threat in the face of ISIS – now called Islamic State. After being essentially thrown out of Iraq it found open space and territory in eastern Syria and established close ties with the Al-Nusra Front which the US had earlier declared a terrorist group.

Now Washington needs a coalition of Sunni states to fight the Islamic State because “America can't once again go in to Muslim nation and be the aggressor, it has to be led by Sunnis, to attack a Sunni organization [the IS],” Biden said, acknowledging that it is for the first time that the US uses a geopolitical strategy.

“Even if we wanted it to be, it cannot be our fight alone,” Biden said. “This cannot be turned into a US ground war against another Arab nation in the Middle East.”

“But of what I’m more astonished is of his apparent amnesia about what America and Britain were trying to ferment in Syria only a year ago. They were not only putting staff intelligence personnel on the ground, and providing logistical support to the rebels in Syria; they were spearheading the campaign to try to oust Assad,” former MI5 agent Annie Machon told RT.

She added that “Perhaps, the Vice President is finally learning some lessons from history. It does not matter who you think your friends are going to be in the region. Very often they will be taken over or subsumed into a more radical group.”