Of all the lines of argument in the caf transfer forum, the "So you think you know better than Jose Mourinho?" one is probably the most stupid and irritating, which is really quite the achievement.
Jose Mourinho knows far more about football than anyone on the caf. As did SAF. As did LVG. Hell, as did Moyes.
That didn't stop them from making mistakes, it didn't stop them from making bad signings and it didn't stop some caf members from being right when they called out those mistakes and bad signings.
"It's not your fecking job to decide who plays for Manchester United" isn't an argument, it's a way of shutting down argument. If that's how you feel then I really wonder why you come into the transfer forum in the first place given it will inevitably be filled with people who (gasp! shock! horror!) disagree with Mourinho.