Australia were miles away from the rest of the team. SA who were the second best team got beaten by Australia regularly and sometimes by innings. The difference between B/Z and England was much smaller than the difference between SL and Australia. You won't remove England because it won't suit your argument.
Being beaten is different to facing a team where the opposition's batsmen barely have averages above 20-30 and bowlers who'll get shellacked for days on end. Win/Loss is not really the issue here.
Yes Murali had a poor record in Australia but was the best spinner regardless of that fact. Given how Bang tonked Warne, you're doing a disservice to Murali by removing his record against them.. meaning punishing him for achieving something great.
But he wasn't. I just named you 3 spinners, who Murali was clearly better than, who performed better than him in Aus.
Given that Murali has was ahead of the aforementioned bowlers against the rest of the countries, it's reasonable to assume he would done better than those bowlers in Australia. But it wasn't to be..were they ever called for chucking in Australia? were they abused by the PM? were they abused by fans? Were they tortured mentally and scrutinized?
It's not reasonable because, guess what, they played in Aus and Murali did worse than them. We are specifically talking about Australia. Murali doing better in England than an average spinner has no bearing on what happened in Australia. The reality is, spinners do poorly in Aus...but Murali did far worse than would be normal under those conditions.
Ya Warne's record away from home looks good and it has to be. Australia were a dominant team and they won almost everywhere. That means the batsmen always put good score on the board, putting a lot of pressure on the opposition even before a ball being bowled. He also had good support from other bowlers so it became easier to hunt as a group.
It is good...but more importantly it is better than his home figures. Winning away is the toughest thing you can do because no matter how good you are the opposition is going to be more accustomed to playing in their own conditions.
I've already touched on the support argument - go see the pack v lone wolf thread.
Anyway, the point was to show you that the figures do not change drastically even if you do remove Aus or SL. This for your false claim that I feared it showing Warne up or something.
SL was/are an average away team and even Vaas is less effective so Murali often didn't have enough runs on the board and had to bowl out of his skin to win matches. Given that they were average as team, the opposition had the freedom to play Murali more freely. For example, Sehwag got a few big hundreds against Murali. If he had another good bowler to dismiss Sehwag earlier, Murali's record wouldn't have suffered. Ya being in a good team with good bowlers mean you have to share wickets but you have more opportunity to take 20 wickets and do them cheaply.
Yes, he would have to bowl better for his team to win. No doubt. However, we are not talking about win/loss. We are talking about averages and strike rate. Bowling alone means you can bowl more overs, with less competition and have a greater pool of wickets to take. In the pack v lone wolf thread I showed: bowlers with little support are much more likely to gain bigger hauls. These bigger hauls contribute a large proportion to a bowler's record that ultimately affect his record more positively.
Your example re Sehwag has some merit but is short-sighted. Sehwag is only 1 wicket; there are 10 others to take. All Murali has to do is take other people's wickets (of which he can take more of with the lack of competition) to account for the runs he's conceded off Sehwag. Conversely, if Warne is conceding runs and his teammates are taking wickets; he has less of a pool to average out those runs conceded in that game. See, there is a positive and a negative for both.