I watched that episode where Salman laughed on KV in the akhada and also heard the 'fizz' comment. Even on other occasions, I've heard the taunts or leg-pulling. Now, acc to me, it's all in good fun. It never seems to me that Salman is being malicious or mean. Yeah, it could be offensive for someone but KV doesn't seem to mind. When Salman showed that blue curtain-like cloth and made fun of KV, he actually wore a suit next time made from that fabric. So, I think KV takes it in good humour and doesn't mind as much. He did feel bad about the 'fizz' comment, you could see it on his face, but that was just one comment. This whole letter thing and then celebs supporting KV in this matter, is a bit of an overreaction I think.
I feel the general sentiment here is that Salman dislikes KV and is mean to him. But I wanted to see if there are others who think it's not that big of a deal as is made out to be.