The Conservative party leader described the incident in which a 56-year-old man was injured as “hideous”.
Eyewitnesses said the attacker said “this is for Syria” during the incident on Saturday, with another man then heard to shout “you ain’t no Muslim, bruv”.
Leytonstone Stabbing Part 3pic.twitter.com/fwurJ4Kta4— Presidential 👑 (@LowkeyMo_) December 5, 2015
Cameron said: “Some of us have dedicated speeches and media appearances and soundbites and everything to this subject, but ‘you ain’t no Muslim, bruv’ said it all much better than I could have done.
“Thank you, because that will be applauded around the country.”
Muhaydin Mire, Sansom Rd, Leytonstone, appeared yesterday at Westminster Magistrates’ Court charged with attempted murder and was remanded in custody to appear again in court on Friday.
Prosecutors allege the attack was an act of terrorism.
Mire is accused of punching his victim to the ground and repeatedly kicking him before taking hold of the victim’s head and cutting a 12cm wound in his neck.
The victim was in surgery for five hours after the attack.
Mire also allegedly brandished his knife at other members of the public, aiming it at the throat of at least two of them.
He was Tasered three times by police officers before being arrested. Images and flags associated with Islamic State were allegedly found on Mire’s mobile phone after the attack, along with other images relating to the Paris terror attacks and a recent UK police training exercise on how to deal with a potential active shooter.
Meanwhile, Syria has accused the US-led coalition of launching air strikes on an army camp that killed three soldiers and wounded 13.
The US has denied the claim, saying the alliance carried out four air strikes against oil wells in the province — all of them miles from the alleged location of the attack.
The city of Deir el-Zour, where the purported strikes happened on Sunday, is mainly held by IS but the Syrian government maintains a presence in some parts.
According to the Syrian Observatory for Human Rights, the aircraft behind the incident in Deir el-Zour are “believed” to belong to the anti-IS coalition.
If confirmed, the air strikes would mark the first time coalition forces fighting IS in Syria and Iraq have attacked Syrian government forces.