BAGHDAD - Salman Khaled has already lived through Baghdad's sectarian disintegration; with Iraq now splintering into Shi'ite, Sunni Arab and Kurdish regions, he says this time the survival of the country is at stake.
"Things are really tense and it could get worse," said the 23-year-old Sunni Muslim student.
"If the politicians continue as they are doing now, we are on the path to separation."
When Khaled's father was shot dead by Shi'ite gunmen at the height of Baghdad's religious bloodshed seven years ago, his family took shelter in a Sunni neighbourhood of the capital.
They made their flight as violence forced apart communities that once mingled in the city. Today the family lives in the Adhamiya district, close to the Abu Hanifa mosque where one of Sunni Islam's most influential theologians is buried.
At his home on an unpaved street, Khaled says he still feels secure in Adhamiya but he rarely goes to the rest of Baghdad where blast walls and security checkpoints hint at the fate of a fractured Iraq.
Iraq's latest - and gravest - crisis erupted when mostly Sunni fighters swept through the north last month. Now the jihadist black flag flies over of most of the country's Sunni Arab territory.
Kurdish forces, exploiting the chance to take another step towards independence, seized the city of Kirkuk and nearby oilfields, leaving the Shi'ite-led government controlling only the capital region and the mainly Shi'ite south.
The government is trying to reverse this de facto, three-way split of the country, but its reliance on Shi'ite militia and volunteers rather than the ineffectual national army has deepened sectarian mistrust without pushing the rebels back.
Across Baghdad a Sunni living in the Shi'ite area of Maalef, cut off from the rest of the city by a checkpoint where non-residents are turned back, said life there had become unbearable for those who do not belong to the majority Shi'ite community.
"The Sunnis all want separation now," said the 37-year-old electrician, who asked not to be named for his security. "Facts on the ground tell you this will be the final result. On both sides now you have extremists who don't want to get along".