As a Lions fan I defended Caldwell's firing then and do so now. I don't think that proves Flores' point. The better point about Caldwell, which Flores later makes in his document, is that Caldwell didn't even sniff another job after that. A guy who won a SB as a coach AND as an OC can't even get another shot at OC, or even QB coach.
GMs should be able to hire their own coach. That Lions team saw a GM get fired after terrible start to the season, multiple embarrassing losses etc. We brought in a flunkie from the Patriots, and he kept Caldwell for two seasons. Two mediocre seasons. If you bring in a new GM it's only fair that he get to bring in his guy. That guy happened to be a fukking disaster (Patricia) but I still maintain my view. Caldwell had one really good season followed by a lot of mediocrity. Anyone who follows the team here will tell you that.
I'm not a Chargers fan but I've seen black posters here made similar arguments about Anthony Lynn. Personally I don't know enough about the situation. I will say this: Anthony Lynn came to Detroit and was our OC this season, and he was embarrassed and humiliated by a questionable first year coach who took play calling away from him after only a few games. Lynn was blamed for us not having any decent WRs at the time, and having Jared fukking Goff as QB. I simply don't believe that a white OC would have been treated that way.