On Monday, David D. Kirkpatrick, the Cairo bureau chief for The Times, quoted one of the Egyptian demonstrators outside the American Embassy, Khaled Ali, as justifying last week’s violent protests by declaring: “We never insult any prophet — not Moses, not Jesus — so why can’t we demand that Muhammad be respected?” Mr. Ali, a 39-year-old textile worker, was holding up a handwritten sign in English that read: “Shut Up America.” “Obama is the president, so he should have to apologize!”

I read several such comments from the rioters in the press last week, and I have a big problem with them. I don’t like to see anyone’s faith insulted, but we need to make two things very clear — more clear than President Obama’s team has made them. One is that an insult — even one as stupid and ugly as the anti-Islam video on YouTube that started all of this — does not entitle people to go out and attack embassies and kill innocent diplomats. That is not how a proper self-governing people behave. There is no excuse for it. It is shameful. And, second, before demanding an apology from our president, Mr. Ali and the young Egyptians, Tunisians, Libyans, Yemenis, Pakistanis, Afghans and Sudanese who have been taking to the streets might want to look in the mirror — or just turn on their own televisions. They might want to look at the chauvinistic bile that is pumped out by some of their own media — on satellite television stations and Web sites or sold in sidewalk bookstores outside of mosques — insulting Shiites, Jews, Christians, Sufis and anyone else who is not a Sunni, or fundamentalist, Muslim. There are people in their countries for whom hating “the other” has become a source of identity and a collective excuse for failing to realize their own potential.

The Middle East Media Research Institute, or Memri, was founded in 1998 in Washington by Yigal Carmon, a former Israeli government adviser on counterterrorism, “to bridge the language gap between the Middle East and the West by monitoring, translating and studying Arab, Iranian, Urdu and Pashtu media, schoolbooks, and religious sermons.” What I respect about Memri is that it translates not only the ugly stuff but the courageous liberal, reformist Arab commentators as well. I asked Memri for a sampler of the hate-filled videos that appear regularly on Arab/Muslim mass media. Here are some:

ON CHRISTIANS Hasan Rahimpur Azghadi of the Iranian Supreme Council for Cultural Revolution: Christianity is “a reeking corpse, on which you have to constantly pour eau de cologne and perfume, and wash it in order to keep it clean.” http://www.memritv.org/clip/en/1528.htm — July 20, 2007.

Sheik Al-Khatib al-Baghdadi: It is permissible to spill the blood of the Iraqi Christians — and a duty to wage jihad against them. http://www.memri.org/report/en/0/0/0/0/0/0/5200.htm — April 14, 2011.