at least the Sith are honest I mean, no, the MFers lie to everyone about everything because others are just means to an end so Sith manipulate others to get the desired reaction/outcome. Lie, truth, doesn't matter. Say whatever gets you more power.

And even if Sith were honest about why they wanted to kill you, they are still trying to kill you.

It's intentionally weak logic. You could flip it on its head by arguing that at least the Jedi are trying to help you dispute their flaws.

Atton Rand, the character that says this in KotOR2, is a perfect example of the problematic nature of this both sides view. Yes, the Jedi were not perfect and their flaws ultimately led to incredible suffering and the collapse of the Republic along the way. But the Sith were actively trying to collapse the republic and cause suffering. The Sith created a facist state that (if it had been successful) would have created persistent suffering indefinitely, with no hope or escape. No one thinks Luke is the bad guy form overthrowing the Empire and restoring the Jedi because the empire was utterly evil.

Like Atton Rand (depending on the path chosen), a reasonable person should realise that it is better to work with a flawed agent/system trying to do good, than to allow those flaws to cause ambivilance toward both the flawed agent/system and an obviously evil one.

Atton Rand (who's name was chosen for its similarity to "atone" as in atonement) can change from this view and end up rebuilding the Jedi order (if you play light side). Likewise, the correct answer to the "both sides" argument is to throw off ambivlance and work to fix the broken but beneficent system while fighting evil. The Democrats in the US, and left-center liberals in other countries, have flaws. Fight to fix them. Don't both sides and allow absolute evil to eliminate the flawed good.