Yeah, but at the end of the day all of those Jedi who turned were defeated. Also, who always eventually wins in the films? The lightside. Who has the heroes that the majority of the people like? The Lightside.
Sorry, everything good eventually points to them.
We really need to get back on topic; Obviously the jedi are aware of other emotions, they warned Anakin of the dangers of passion. They also warn against Jealousy. One of the paths to the Dark side; Jealousy, Anger, Hate, suffering.