Re:Eto'o. Guardiola was basically the club's hitman. The club wanted to get rid of him before they even decided to hire Guardiola. That particular relationship could never be anything different than what it was
Although given their personalities, it likely didn't need any prompting from the club's higher ups to go that way
Ronaldinho was another player the club wanted to get rid of, but with him they had no problem because Milan had been flirting with him for 4 years and Dinho was more than happy to leave by then. Eto'o wanted to stay, so they had to force him out. Enter Guardiola
Zlatan said it best: barcelona wanted their players to be boring little soldiers, doing what they were told and never stepping outside the boundaries on and off the pitch. Even Dani Alves had a lot of problens with the board because of his personality. The moment his performances declined a little bit the club began trying to force him out