Let me clarify- I DON'T think and I never meant that Dhoni has anything against Sehwag. He may or may not have, but none of these things indicate that.
Dhoni was not the captain during the test series in Australia. He was the captain during the ODIs. Sehwag played 5 matches before the final and scored 81 runs with a highest score of 32. So we can't say that Dhoni was unfair and biased in not playing him. As a captain he took the call, and well we did win the Cup. If I was the one taking the call, I'd have played Sehwag over Uthappa as Sehwag on his day is the most destructive batsman. But we should appreciate that it was Dhoni's call as the captain. The other thing is that captains have no say in Man of the Match awards. It is decided by the match refree. From T-20 world cup, I just remember that Sehwag missed the final as he was injured. If India had already qualified for a round, there is no harm in giving other players on the bench a chance.
Even when I mentioned that he is not bowling Sehwag, I didn't want to say that Dhoni is biased. I am just saying that in my opinion Dhoni should bowl him much more than he does.