No - Champs - that is going much too far. Let me summarise those posts of yours:
1) Mowbray got absolutely everything wrong on Saturday.
2) He did all last season as well.
Rubbish.
Early in November, with about a third of the games played (16), our goal-difference was -1 (with 20 goals against), and 14 other teams had conceded the same number or more goals than us.
After that, as we know, our season was a roller-coaster, with two good spells and two bad ones. During that final two-thirds of our season, our main problem switched from not being able to score enough, to regularly crumbling at the back in the last 20 minutes. However, during that time, we actually still played very well in January, and pretty well again in the last month of the season.
In other words, sweeping generalisations about how bad our defence has been for more than a year don't actually tell the whole story.
It's the same with your description of the Charlton game. I saw no evidence that the team wasn't fit. Are you seriously arguing that with numerous members of staff whose specific job it is to monitor conditioning and fitness, players are going to run out under-cooked?
As for trying to present Downing and Johnson as decrepit, that's just silly. And Downing , with 35 England caps - mainly on the wing - can't cross a ball? Seriously?
You're even forgetting that when Bennett was first switched to full-back, the general fan reaction was that he looked a revelation in that position.
What you have done is to take every aspect of one game and represent it in the worst possible light.
It was a very disappointing performance, but you have fallen into the trap of blaming everything on the manager. Do you really believe TM told Lenihan to lump the ball aimlessly, virtually every time it was near him? As for Dack, he more or less DID play in midfield, because retreating to escape his man-marker seemed to be the only thing he could think of! Danny Graham, our best player last season, looked half-asleep. Managerial instructions?
And, don't forget - poorly as we played, we had 62% possession!
Obviously, Mowbray does have to change things now, because there has been such a massive reaction (although that will give people the chance to call him "tinker-man" again). I would say Venky's will probably give him two months.
The thing is, though, this is football. Drawing far-reaching conclusions from the opening game(s) of a long season seems to me to be ignoring all past experience. It won't mean anything dramatic - in the other direction - if we beat Fulham, either. Trends DO eventually develop, but if you look at the Championship last season, many clubs went on good or bad runs at various points.
The Fulham game specifics? Bennett clearly can't be retained. And yes - he probably will have to take a punt on Tosin. But what if he has a poor game? Mowbray's fault for signing him? Youngsters in? No-win either way for Mowbray, probably!
As for the defence in general...I know - we should have kept Paul Downing...despite the fact that many of the supporters who have been arguing that case were saying at the start of last season that he was a D.1 workhorse (like Smallwood), who wasn't good enough for the Championship!
It is the short-memory syndrome that annoys me most, but not far behind are a) changing the criticisms every week, even when that is contradictory (for example, calling for mass changes, and then accusing TM of tinkering); b) distorting facts and statistics to suit a particular line of argument; c) believing that there are managers out there who always get it right, when history demonstrates that very few are consistently successful (Ranieri, anyone?)