Redknapp has been asked by the FA to explain his own comments after ref Chris Foy awarded West Brom a goal in his side's 2-1 Boxing Day defeat - despite a foul on Rob Green.
And he reckons Manchester United chief Fergie was simply frustrated.
Redknapp said: "Good luck to Alex. I don't want to see anyone get charged.
"You get frustrated, we all do, it is very difficult."