Americans Laugh so Hard when Jon Stewart Tries to Pronounce Ahmadinejad's Name. Funny or Very Funny?

What is funny about pronouncing this name: Mahmoud Ahmadinejad?! Each time Jon Stewart pretends he can't pronounce it, his Audience goes crazy with laughter -- I hear their laughter when I watch its video (embedded below). I guess I am puzzled that after nearly 8 years of Ahmadinejad's presidency, and all the talk about him on TV, American TV viewers still Laugh at mockery of his name. His latest trip to NYC is his 7th trip to USA! Seven trips to USA, and Americans can't get to pronounce his name correctly, but keep on talking about his news 24 hours, every day, every year since Mahmoud became Iran's President in 2005. Even Saturday Nights Live made a music video about him after his comments on homosexuals during his speech in Columbia University. 

Everyone knows I despise Mahmoud Ahmadinejad, and consider him a murderous, pathological liar, but I am curious how long does it take for a joke to get old and lose its punch? Or, maybe I want to know what does it take for American public to stop making caricatures of people of the World, and maybe try to get to know their cultures, their ways, their beliefs, and especially their dictators. After all, I don't think American Public laughed for years at mockery of the names of Stalin, Saud bin Abdulaziz Al Saud, Mao Tse-tung, Fidel Castro, Khrushchev, Mohammad Reza Pahlavi, Mubarak, Milošević, Osama bin Laden, Gaddafi, Augusto Pinochet, Ali Abdullah Saleh, Saddam Hussein,etc. who are/were all savage Dictators/murderers the American government engaged with diplomatically at one time or another. Now, what started as an innocent observation turned into a rant to criticize the glorious foreign policy of US government. It just happens.

See the video below. Jon Stewart on Ahmadinejad starts at 3:03 mark. By the Way, Jon Stewart's take on Bibi Netanyahu's Diagram moment is quite funny. 

1st Post-Script: I just remembered names of North Korean Leaders -- I guess they get mocked a lot too.
 2nd Post-Script:  I think name ofa  savage dictators is one of the closest things s/he has in common with his/her oppressed populace.