Calderon slams management of Real Madrid president Florentino
Calderon believes general manager Jorge Valdano and sporting director Miguel Pardeza did not want to part company with Manuel Pellegrini but Perez was determined to bring in Jose Mourinho.
He told Catalunya Radio: "I know that neither Valdano nor Pardeza wanted Pellegrini to leave. This is a reality we cannot hide from.
"I would love if Florentino's plan succeeded but he does things without the opinion of those who know. It is a mistake he has not learned from.
"Mourinho has a CV that is beyond dispute and can train at any big club. As we have no crystal ball, we wait to see if he is a great coach.
"If he wins, people forget everything.
"It happened to me with (Fabio) Capello. The public cannot stand not playing well and not winning. The fans want the team to play well. If you end up getting the title, they stay happy."
He continued: "Florentino has used his latest bullet but it's against himself, not against the project. When someone bases their approach on spite, hatred and on trying to erase the past, fate will hand him his reward.
"Having dispensed with (Wesley) Sneijder and (Arjen) Robben just because I signed them seems a mistake. But I know it well. I also know he tried to sell (Gonzalo) Higuain. I don't know if he still wants to sell now. I hope not."