Complex sentence: Mr. DiMino has dedicated himself to defending, promoting and preserving Italian American heritage and culture and has appeared leader of the Italian American community and has spoken out against shows like MTV's "Jersey Shore" and others in which Italian Americans are negatively portrayed.
Split into simpler sentences: Mr. DiMino has dedicated himself to defending, promoting and preserving Italian American heritage and culture. He has spoken out against shows like MTV's "Jersey Shore" and others in which Italian Americans are negatively portrayed.