Exactly! Saruman grew power-hungry and built his replica of Barad-dur and Sauron's army. Even if it "was just a child's plaything or an ignorant slave's imitation" (paraphrasing) it was still very similar. Saruman also wished to destroy the race of man sort of like Sauron (I think).
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Ho! Ho! Ho! to the bottle I go
To heal my heart and drown my woe.
- excerpt from A Drinking Song
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