Why Stereotype!!??

In American, most asian characters in a drama/Tv show are stupid and silly in life and only know about studying, also, American media company like to emphasize the special Asian accent in the media. In Taiwanese drama show, the character who are Taiwanese American or people who have study in American usually play a serious role and they are usually physical stronger, smarter, and richer than the normal Taiwanese. They are either the CEO of a company, kid from a rich family or a super smart agent. A character like Taiwanese American and Americanize Taiwanese will never become a failure. Why is it becoming like this. Now, not only white people are trying to stereotype Asian but Asian are stereotyping themselves too. American is always more open-minded than Asian. American is always wealthier than Asian. English is better than Mandarin. American is stronger and more muscular than Asian. Asian stereotyped themselves as the inferior and American as the supremacy. So why should Asian blaming on other people stereotyping them when they are stereotyping themselves.