You need to remember this is the F1 though. To these guys, all they need is an inch or two, if that. The room that webber gave vettel was fairly generous in my eyes. In most cases, a driver in webbers position would cut across to block before vettel even got the chance to get alongside. To me it didnt seem like webber made it difficult for him at all.
Im sure you all saw the battle with button and hamilton soon after. Same circumstances and some of there moves were even closer at times than vettel, but because they followed there lines and didnt try to pull any crazy tricks (like driving into your teammate lol) it didnt have the same outcome.