Look, everyone is saying Saruman is just as bad as Sauron, but here's the thing:

Yes he is moving towards Sauron strategically on specific issues, but these issues are important to his base and he has to throw them a bone.

Yes he is illegally killing Rohan civilians, but nobody claimed the defense of the regions west of his Stone Circle system would be painless.

Yes his armies look and foreign policy look eerily similar to Sauron's, but he promises he's trying to stop him actually.

You purists in the Shire keep saying it's not necessary to destroy the whole forest of Fangorn but he got the endorsement of Lurtz, so he clearly knows more about politics than you do.

Anyone serious understands that resisting Sauron means voting for Saruman.