With hundreds of people dying in Syria, Egypt, Iraq and Lebanon at this current time, the number of Palestinian casualties is marginal in comparison (without wishing to trivialize any loss of life).
So what did the LA Times write for added effect (emphasis added)?
The number of Palestinians killed by Israel security forces has more than tripled this year over last; including Monday’s deaths, 13 Palestinians have been killed in 2013, compared with four for the same period in 2012.
With no differentiation between combatants and civilians, a small rise from four to 13 deaths is embellished to make it sound more dramatic and negative for Israel than necessary.