'He used to go every Friday to the marches like thousands of other people, ' he said.
The teenager was shot east of Jabalia in northern Gaza, the ministry said, while a medical source named him as Mustafa Abed Rabbo. In response the military said an aircraft and a tank struck two Hamas posts. "This Friday was his destiny to die as a martyr", the boy's father, Abdel-Aziz Abdel-Al, told Reuters.
Since often violent protests began on March 30, at least 178 Palestinians have been killed by Israeli fire, the majority during demonstrations.
"There were too many false realities that were created - that people worship - that I think needed to be changed", said Kushner.
Israel's tactics against the protests have drawn global condemnation.
A 12-year-old boy was among three Palestinians killed Friday during protests at the Gaza-Israel border, the Gaza Ministry of Health said.
Another Palestinian, 28-year-old Hashem Hassan, said he saw Abdel-Al being shot 70 metres from the fence, adding: 'He threw a few stones, which flew just a few yards.
The Israeli military says it used force necessary to repel 13,000 Palestinians who massed at several points at the fence.
Asked about Abdel-Al's death, an Israeli military spokeswoman said only that troops had kept to their open-fire regulations. Some hurled rocks, firebombs and grenades at troops under cover of smoke from burning tires, injuring a soldier, and nine Palestinians briefly crossed into Israel, the military said. An Israeli soldier was killed by Palestinian sniper fire.
The clashes at the border, which Israel says are being orchestrated by Gaza's Hamas rulers, have included regular rock and Molotov cocktail attacks on troops, as well as shooting and IED attacks aimed at IDF soldiers and attempts to breach the border fence.
But Washington has backed its ally in accusing Hamas of staging the mass-mobilisation, a claim dismissed by the group and the protests' organisers.
The Israeli military said that, twice this week, its patrols discovered and dismantled bombs that had been planted for use against them at the fence. There was no word of casualties. The protesters want rights to lands Palestinians lost during the 1948 war of Israel's foundation, as well as the easing of a crippling blockade that Israel, with the help of neighboring Egypt, has placed on Gaza to isolate Hamas and deny it weaponry.
United Nations and Egyptian mediators have been trying to reach a deal to calm Gaza, where Israel has waged three wars in the last decade.