At least 122 Palestinians have been killed by Israeli fire since March 30, the first day of the ongoing Palestinian "Great March of Return" rally against Israel's crippling blockade since 2007 and the USA embassy move to the disputed holy city of Jerusalem.
Since March 30, 120 Palestinians have been killed by Israeli forces since the popular protests began calling for the Palestinians' right of return to the homes from which they were expelled from in 1948.
Earlier on Saturday, the IDF said troops opened fire at Palestinians crossing into Israeli territory from Gaza who were trying to damage "security infrastructure" inside Israel.
According to Israel, the Gazan practice of "agriculture terrorism", using kites with burning objects attached to them in order to set Israeli fields and property on fire, has caused considerable damage to farmers.
The army said no one was injured in the incident.
The vast majority have been killed during weeks of protests along the border.
Last week militants from Hamas, the Islamist group that controls Gaza, and the Palestinian Islamic Jihad, fired dozens of rockets and mortar bombs at Israel, drawing Israeli air and tank strikes in the heaviest round of fighting in years.
On Friday, a 21-year-old volunteer paramedic was shot as she tried to help evacuate wounded protesters near Israel's perimeter fence with Gaza.
No Israelis have been killed.
Friedman said that after investigating the issue himself - "Speaking to people in the military in the State of Israel, the United States and other countries whose confidentiality I'll maintain" - he was convinced that Israel could not have used "less lethal means" to defend itself.
More than two million Palestinians are packed into Gaza, a narrow coastal enclave where unemployment is high and poverty widespread.
Since April, tens of thousands of people have protested the Israeli-Egyptian blockade of Gaza and have demanded the right to return to land that now sits inside Israel.