NYT shows it doesn't know history

In a long NYT Magazine article about Palestinian Arab infighting, the first paragraph says:

Palestinians never used to do these things to one another. Putting bullets in the back of the heads of men on their knees. Shooting up hospitals. Killing patients. Knee-capping doctors. Executing clerics. Throwing handcuffed prisoners to their deaths from Gaza’s highest (and most expensive) apartment buildings. There is a madness in Gaza now. Hamas — a religious political-military organization that dominated the last Palestinian elections — claimed it was fighting infidels, with a holy sanction to kill. Fatah — the largest group in the Palestine Liberation Organization — was nearly as brutal as Hamas and claimed it was fighting the Nazis. Poor young men from the squalid, stinking refugee camps of Gaza, their heads filled with religious slogans and revolutionary cant, took off their knitted black masks to pose in front of the gilded bathrooms of the once-powerful and rich men of Fatah. Then they stole the sinks, toilets, tiles and pipes, leaving the wiring and the metal scraps for the ordinary, unarmed poor.

Of course, Palestinian Arabs have been killing each other for decades. They did it in 1937-39. They did it in 1947. They did it in 1991. They have been doing it for the past few years, not just months.

Is it any surprise that the august NYT doesn't know basic history?