Qassemi's remarks came on Friday in reaction to Israeli President Reuven Rivlin who made insolent comments against the Iranian nation.
"It is a shame that officials of a regime which has brutality, aggression, disgracefulness, maliciousness and deceit as among its main characteristics, are addressing the richly-cultured, brave and civilized Iranian people in such an insulting way," the Iranian foreign ministry spokesman said.
Qassemi warned warning the Tel Aviv regime's racist, narcissistic and impolite officials of the consequences of their thoughtless remarks.
During his remarks on Thursday, the Israeli president whose role in government is largely ceremonial compared with the prime minister, said, "From our point of view, now is the time to join the effective sanctions on Iran and not to circumvent them."
"The Iranian beast must be starved and not fed. This is the only way to guarantee the stability of the world," Rivlin added.
Qassemi said the great and educated Iranian nation respects the dignity and rights of the followers of Prophet Moses and draws a distinction between them and the fascist and racist regime in the occupied lands.
The Israeli president, who also met German Chancellor Angela Merkel, also urged Germany to join the US sanctions on Iran after Washington unilaterally withdrew from a 2015 nuclear deal Iran signed with the Group 5+1 (the US, China, France, Britain and Russia plus Germany) which is still supported by Europe as well as China and Russia.
Israel is estimated to have 200 to 400 nuclear warheads in its arsenal. The regime, however, refuses to either accept or deny having the weapons.
It has also evaded signing the Non-Proliferation Treaty (NPT) in flagrant violation of a UN Security Council resolution amid staunch endeavor by the United States and other Western states on international levels in favor of its non-commitment to the accord.
Iran has repeatedly announced that its nuclear program is merely for peaceful purposes and poses no threat to the international peace and security. Iran's nuclear facilities have been under the constant monitoring of the International Atomic Energy Agency for the last two decades. But a nuclear accord signed by Iran and six world powers in 2015 placed the country under even stricter rules of supervision and inspection. Yet, the UN nuclear watchdog has underlined in 12 reports under the deal as well as dozens of more reports prior to the endorsement of the Joint Comprehensive Plan of Action (JCPOA) that there has never been any anomaly at Iran's nuclear program to indicate a move or drive towards a military nuclear capability, reasserting that the country's nuclear program has remained strictly loyal to its stated "peaceful purposes".
Back in June, the Iranian foreign minister decried Israel’s nukes as a real threat to the Middle East region and the rest of the world, calling for a new focus on the occupying regime’s nuclear arsenal.
Iranian Foreign Minister Zarif posted a message on his official Twitter account, saying although Iran had no nuclear weapons, Israel, which is the sole Middle Eastern country to possess such weapons, continued to "howl" about "fabricated" Iranian "ambitions".
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