I think Rush tends to complicate issues which are not complex. I also am a football fan. Do I think McNab is overrated? It's possible to hold this opinion without being racist.
So, IMHO, calling McNab overrated after 4 games is pretty weak logic. Stupid even for a sports analyst...but even for a mere fan it's lame. Then, taking his first assertion as gospel...he goes on to blame it on the "liberal media conspiracy" and bases the whole thing on race. Now that's just plain old woo-wooism.
If he'd have just claimed McNab was overrated he would have had an arguable point. The rest of it just showed a penchant for knee-jerk political and racial bias.
It's even more than that. Most sport slumps and streaks, statistics show, are merely due to random clumping. It is EXCPECTED that McNair would have a four-game slump SOMETIME in his career. Sports commentary is, in a large part, finding fictional reasons to "explain" streaks and slumps that require no more explanation than "it's random", much like one could try to "explain" why a die landed "6" three times in a row once in a while. Ever noticed that none of these sports "experts", so good in "explaining" what HAPPENED last week, do better than random chance when they predict what WILL HAPPEN next week?
So what fictional reason do you get? That is a social thing, which depends on what kind of person the commentator is. From the "well-informed" sports commentators, you get an "explanation" in the form of a long list of nonsense on the "team's spirit" or their "special relation with the coach". From the bleechers' bum, you get the "explanation" that is so-and-so's fault, the one player (or coach) who is the cause of all the team's woes. And from Rush Limbaugh, you get the "explanation" that it is the "liberal media" fault for "protecting" the unqualified darkie who shouldn't be playing instead of a white man in the first place.
What a surprise, eh? Good riddance to Rush, too.