The world's Islamist extremist groups, from the Islamic State in Iraq to Hamas in the Gaza Strip, have turned what Adolf Hitler once called the "master race" into the "master faith," Israeli Prime Minister Benjamin Netanyahu said last week.

At a counter-terrorism conference held in Israel on Sept. 11, Netanyahu said the brutality and terrorism carried out by Islamist militants is nothing new. Nazi Germany did the same by killing six million Jews that were considered a threat to the "Aryan master race," during the Holocaust, according to Netanyahu.  

"We know this," Netanyahu said according to "There's a master race; now there's a master faith. And that allows you to do anything to anyone, but first of all to your own people and then to everyone else."

From then on the militants use "new technologies" to commit atrocities, including "taking over civilian populations...using your people as human shields, the same people you execute; and then firing indiscriminately at civilians," the prime minister said at a conference for the International Institute for Counter-Terrorism outside Tel Aviv.

Israel has previously accused the Gaza-based Palestinian militant group Hamas of using civilians as human shields throughout its 50-day war over the summer. But Israel faced international criticism for killing far more Palestinians with constant air strikes in the coastal strip.

Netanyahu said the world's Islamic militants, who are harder to fight because they are not real armies, will stop at nothing to achieve their "one common goal." Many groups, including the Islamic State and Boko Haram in Nigeria, have killed countless civilians in an attempt to establish a regime with strict Islamic rule.

"These groups have absolutely no moral or other impediment to their mad desires. Once they have massive power, they will unleash all their violence, all their ideological zeal, all their hatred, with weapons of mass death," Netanyahu said.

The prime minister's speech comes as world leaders in Syria, Iraq, Great Britain and U.S. scramble to curb the threat from the Islamic State, also known as ISIS, which has taken over parts of northern Iraq and executed three hostages, two Americans and one British, in less than a month.