look on the surface.

-they wanted to overthrow the government
-they committed a SHITLOAD of crimes to further their agenda (IMO Blowing up the Death Star is basically an act of Terrorism)
-they implored a 'banned' religion (The Jedi Way) in their ideology
-they indiscriminately killed people (The Empire only killed during battles)

I know they've been painted as "good guys" but the Rebels are just as dirty as The Empire...