Syria's revolt against the rule of President Bashar al-Assad is turning into an armed insurrection, with previously peaceful demonstrators taking up arms to fight their own army and the "shabiha" – meaning "the ghosts", in English – of Alawi militiamen who have been killing and torturing those resisting the regime's rule.

Even more serious for Assad's still-powerful supporters, there is growing evidence that individual Syrian soldiers are revolting against his forces. The whole edifice of Assad's Alawi dictatorship is now in the gravest of danger.

In 1980, Assad's father, Hafez, faced an armed uprising in the central city of Hama, which was put down by the Special Forces of Hafez's brother Rifaat – who is currently living, for the benefit of war crimes investigators, in central London – at a cost of up to 20,000 lives. But the armed revolt today is now spreading across all of Syria, a far-mightier crisis and one infinitely more difficult to suppress. No wonder Syrian state television has been showing the funerals of up to 120 members of the security services from just one location, the northern town of Jisr al-Shughour.

The first evidence of civilians turning to weapons to defend their families came from Deraa, the city where the bloody story of the Syrian uprising first began after intelligence officers arrested and tortured to death a 13-year-old boy. Syrians arriving in Beirut told me the male citizens of Deraa had grown tired of following the example of peaceful Tunisian and Egyptian protesters – an understandable emotion since people in those countries suffered nothing like the brutal suppression meted out by Assad's soldiers and militiamen – and were now sometimes "shooting back" for the sake of "dignity" and to protect their wives and children.

Bashar and his cynical brother Maher – the present-day equivalent of the outrageous Rifaat – may now be gambling on the old dictator's saw that their regime must be defended against armed Islamists supported by al-Qa'ida, a lie which was perpetrated by Muammar Gaddafi and the now-exiled leaders Ali Abdullah Saleh of Yemen and Ben Ali of Tunisia and Hosni Mubarak of Egypt and the still-on-the-throne al-Khalifas of Bahrain.

The few al-Qa'ida cells in the Arab world may wish this to be true, but the Arab revolt is about the one phenomenon in the Middle East uncontaminated by "Islamism". Only the Israelis and the Americans may be tempted to believe otherwise.

Al Jazeera television yesterday aired extraordinary footage of a junior Syrian officer calling upon his comrades to refuse to continue massacring civilians in Syria. Identified as Lt Abdul-Razak Tlas, from the town of Rastan, he said he had joined the army "to fight the Israeli enemy", but found himself witnessing a massacre of his own people in the town of Sanamein. "After what we've seen from crimes in Deraa and all over Syria, I am unable to continue with the Syrian Arab army," he announced. "I urge the army, and I say: 'Is the army here to steal and protect the Assad family?' I call upon all honourable officers to tell their soldiers about the real picture, use your conscience... if you are not honourable, stay with Assad."

Differentiating rumour from fact in Syria is getting easier by the week. More Syrians are reaching the safety of Lebanon and Turkey to tell their individual stories of torture and cruelty in security police barracks and in plain-clothes police cells. Some are still using the telephone from Syria itself – one to describe explosions in Jisr al-Shughour and of bodies being tossed into the river from which the town takes its name.

For well over a month, I have been watching Syrian television's nightly news and at least half the broadcasts have included funerals of dead soldiers. Now Syria itself declares that 120 have been killed in one incident, an incredible loss for an army that was supposed to instill horror into the minds of the country's protesters. But then the supposedly invincible Syrian army often showed itself woefully unable to suppress Lebanese militias during the country's 1975-90 civil war. An entire battalion of Syrian Special Forces troops was driven out of east Beirut, for example, by a ragtag group of Christian militias who would have been crushed by any serious professional army.

If you wish to destroy unarmed civilians, you shoot them down in the street and then shoot down the funeral mourners and then shoot down the mourners of the dead mourners – which is exactly what Assad's gunmen have been doing – but when the resistors shoot back, the Syrian army has shown a quite different response: torture for their prisoners and fear in the face of the enemy.

But if the armed insurrection takes hold, then it is also the 11 per cent Alawi community – once the frontier force of the French mandate against the Sunnis and now the prop of Assad against the poorer Sunnis – which is at threat. So appalled is the Assad regime at its enemies that it has been encouraging Palestinians to try to cross the frontier wire on Israeli-occupied Golan. The Israelis say this is to divert world attention from the massacres in Syria – and they are absolutely right.

The Damascus government's Tishrin newspaper has been suggesting that 600,000 Palestinians may soon try to "go home" to the lands of Palestine from which the Israelis drove them in 1948, a nightmare the Israelis would prefer not to think about – but not as great a nightmare as that now facing the people and their oppressors in Syria itself.