I've only seen a few minutes of Osbourne's television show on MTV. In the segment I saw, he was telling his pot-head son of the perils of drug use. Osbourne's brain is obviously fried from his killing of brain cells over the years, and he was reminding his son of that fact. Osbourne then was the concerned dad in a discussion with his dating daughter. I'm not sure that describing him as a "dirt bag" is accurate for this stage of his life.
In my book, his present language, his psuedo 'music', his dress and inclusion of satanism in his act qualify for the 'dirt bag' designation. I can only guess his politics are the same as Klintoon.
Why give credibility to someone who obviously has some serious character flaws?