Jedi Games: Inherently Hypocritical?

[Alefiend]

... the best way to show the flaws in the dark side is violence.

This is actually fairly true, considered in context. Many who draw on the dark side do so because they want power, and they see the Jedi way as weak. By defeating the dark sider while remaining committed to the light, you show them that the dark side is not stronger—if anything, it's weaker because it tends to cloud your judgment.