Politics is Dirty

Deeply impressed by a personal comment from Dr. A.H.Y. Lin (History Department, University of Hong Kong): "Politics is Dirty".
I can only categorise this post under "feelings" instead of opening a "Politics" label as I don't like talking about Politics. I feel too tired towards this kind of Critics between the "Rights" and the "Left". They all have only the same interest: Win more support by Painting their opponent "Black".
Only little issue can be manipulated and enlarged to unlimited scale. In doing so is absolutely not objective and constructive to the whole atmosphere.
But thanks for this kind of unique culture in this place so that everyone can express his own view freely. Of course, enough education is the pre-requisite so that all people can think in a realistic way.
The issue arises from the picture will not be further elaborated by me. Instead, I just want to express my little "feelings" to the whole situation.