Wolfman said:

"From my point of view the Jedi are evil"

Crap dialogue and crap acting.

That is quite the worst line yes but not for the reasons stated above.

The reason is that it makes it look like the dark side makes one stupid rather than evil. He knew too well Palpatine was the evil Sith who tried to take over the Republic (after all he personally admitted it to him before he went to rely this news to Windu). So after he turned (for the selfish reason to save his wife, NOT because he thought the Jedi were trying to stage a coup) he suddenly forgot all that.

And here is how it should have been... He traded the fall of Republic (helped a criminal, ie Palpatine) for his wife which is an evil thing. In order to protect himself from a persecution he should have willingly try to get rid of the Jedi.