He did an interview with Time magazine:

“I respect Fidel Castro,” Guillen said in the article. “You know why? A lot of people have wanted to kill Fidel Castro for the last 60 years, but that [expletive] is still here.”

The backlash:

https://twitter.com/#!/davehydesports/status/188746864856797184

https://twitter.com/#!/sbnation/status/188830687107874816

https://twitter.com/#!/greenfield64/status/188842692388724736

https://twitter.com/#!/georgediaz/status/188844604018274304