CLEVELAND — Former New York City Mayor Rudy Giuliani got some of the loudest cheers at the opening night of the Republican convention with an emphatic speech touching on violence against police, terrorism and Benghazi.

"We say thank you to the Cleveland Police Department for protecting us," Giuliani said, prompting the first of several standing ovations during his speech. The ovations included audience chants of "Ru-dy! Ru-dy!"

"We know the risk you're taking. And we say thank you to every police officer and law enforcement agent who's out tonight protecting us. Black, white, Latino of every race, every color, every creed, every sexual orientation. When they come to save your life they don't ask if you are black or white. They just come to save you."

But Giuliani was willing to admit that some killings by police are unjustified. "We also reach out our arms with understanding and compassion to those who have lost loved ones because of police shootings, some justified, some unjustified. Those that are unjustified must be punished. Those that are justified, we must apologize to."

Giuliani added that Trump has helped New York City every time the city suffered a tragedy, which Trump did anonymously. Giuliani joked that people would find it surprising Trump helped anonymously.

"I am sick and tired of the defamation of Doanld Trump by the media and by the Clinton campaign. I am sick and tired of it. This is a good man."

In a wide-ranging speech, Giuliani brought up "Islamic extremist terrorism," and said it was important to use that term to describe terrorism. "You know who you are, and we're coming to get you," Giuliani said. "Failing to identify them properly maligns all those good Muslims around the world who are being killed by them," Giuliani said.

Another major applause line came when Giuliani called for a more unified country. "It's time to make America one again. One America. What happened to there's no black america, there's no white america, there is just America?"

Giuliani also said Hillary Clinton is responsible for chaos in Libya, specifically the American deaths in Benghazi on September 11, 2012. "Her dereliction of duty and failure to keep her people safe played a major role, as you heard tonight, in the horrific Islamic terrorist murders ... in Benghazi which claimed the lives of four brave Americans."

Giuliani closed by comparing Trump to President Reagan. "He will make America, like the president I worked for, Ronald Reagan, once again be the shining City on the Hill," Giuliani said. "Vote for Donald Trump for a safer America and for an America headed in a different direction: greatness."

Jason Russell is a commentary writer for the Washington Examiner.