Operation Protective Edge vs Operation Linebacker II

Operation Linebacker II resulted in 1,624 civilians killed in North Vietnam. This was the "Christmas bombing" campaign of the Vietnam War.

Right now just over a thousand are claimed (by the Palestinian Health Ministry) killed by Operation Protective Edge. Other sources cite higher numbers. So somewhere around 800 civilians, putting Operation Protective Edge just about at the halfway point of Operation Linebacker II's on the 21st day of operations.
Operation Linebacker II was only 11 days. 

Operation Linebacker II was an enormous air campaign. So big, in fact, that there was some argument against taking was was upwards of half the US Air Force's manned bomber fleet against North Vietnam.
Linebacker did a spectacular job of destroying a lot of stuff, including a hospital. And, you know, at least 1600 people.
It did not, however, alter the outcome of the war. Well, except arguably to make the South lose because the US passed the Case-Church Amendment which might not have happened if it weren't for Operation Linebacker II.