Is the RP scene in Eve insular? To a degree, yes. This is common in pretty much any game where there are a lot of trolls and not a lot of support for the RP community by the game operators against said trolling. On Lord of the Rings Online, for instance, there are two servers with significant RP populations. One is the old U.S. "RP Encouraged" server (a pretty meaningless label in this context, as Turbine didn't do anything to stop people from trolling the RP community), the other was the old European RP server (where RP guidelines and considerations were officially established). On the RP Encouraged server, the RP community tended to be quite insular and difficult to break into - deep RP tended to happen within kinships (the LOTRO version of corps). On the pure RP server, the RP community was far more open, and there was far more happening on a public level. I think a big part of this was that the server GMs themselves could be counted on to deal with things like Dwarves named "Spanky McBottom" jumping up and down like jackhammers in the middle of your tender RP moments.
Eve is a fairly troll-heavy game, and we in the RP community tend to be easy targets for the sort of folks who get a kick out of ruining other people's fun. The insular-ness of the RP community here is just a natural progression of that. That said, I don't think we're a particularly hard RP community to break into. Where, I think, CG went wrong was when they started seeing the rest of the RP community as one big adversary. Breaking into any RP community is sort of a process of courtship. It may be long and drawn out. It may simply be a matter of eyes meeting across a crowded room. But it is a sort of courtship.