The idea of protecting her planet is not greedy. However, putting into motion the process of a changing of the guard for the ENTIRE galaxy because she isn't getting her way is indeed greedy. Her actions set the ball in motion that the Jedi run with. The Jedi tell her they can not fight a war for her, but have no qualms about doing it for Palpatine, no matter whose name it is in. They continue to question Palpatine's motives and talk on and on about how the Dark Shroud has fallen over the Senate, but then continue to battle those who oppose the now corrupt Republic. Should they take a step back, maybe they see they are on the wrong side of the Battle. Their blind devotion to what they believe is the greater good in fact fuels Palpatine's power. I mean, how could they justify allowing him to stay in power, even if it was the will of the people?
Palpatine did not appear over night. He was obviously a Senator long enough to get himself rooted in the Senate to get voted into high office. Thus, he was not but a few miles from the Jedi temple. Yet the Jedi could not concern themselves with detecting a Sith Lord just down the street? The Sith Lord that was either the only, or one of only two in the Galaxy at the time? When you believe your the best, you don't concern yourself with what your competition may be doing. See: Yankees v Red Sox. That's called arrogance.
As for the Jedi helping him create his clone army, I have always been confused about this part.....but doesn't a Jedi order the creation of the Army? Even at that, Obi-Wan and Yoda bring the army to light, and help militarize the Republic.