I don't think this...
...
is just about ethnic background and socio-economics, though, is it?
Non-Orthodox often get a "everyone else is lesser/unworthy" vibe from Orthodox sources. I have certainly come across it.
Now, this is not true of every Orthodox person. Many are lovely. Some of them are in this thread.
But condescension, patronising or dismissive comments, rudeness, exclusion... yeah, those are definitely there too. And every time I encounter them, I end up walking away thinking, "If that's Orthodoxy, I don't want anything to do with it."
I wouldn't make it as a Buddhist novice. I'd end up looking at the closed door and thinking, Sod it, enlightenment isn't confined to this temple. And if what non-Orthodox encounter of Orthodoxy is metaphorically closed doors, likely many will have the same reaction.
This is something that concerns me.
On one hand, some people really do express themselves in ways that would be guaranteed to push away any seeker or inquirer who would be put off by their prideful arrogance. These are most often new converts, or those in splinter groups, that I see (though I've known a monastic or two to come across that way - I can't judge their heart actually though).
Rus brings out some good points too. In these days, people consider it anything from arrogant, to prideful, to unloving, to downright hateful to have an belief or conviction that differs from their own, etc. I'm not saying you are doing that, just that it is a developing ethos of the times, in the US. I'm not really sure about other places, but I do see indications that we aren't exclusive with that social tendency.
Words can be a problem too. The very Creed states "I believe in ONE holy, catholic, and apostolic Church." It wasn't offensive to them - it was expected.
When we say the same thing, and mean it, all kinds of assumptions are read into that. It takes a paragraph or three sometimes to explain a single word, and we don't always have that time.
So unless we continually qualify ourselves, people "hear" all sorts of things we don't really mean. And sometimes that seems to be converts, who might take up their (mis)understanding and run with it.
It's a mess, and I don't know how to fix it. Certain things we cannot deny - they are our beliefs and always have been, and people who get offended that we won't change them, well, I'm glad we don't. On the other hand, some quotes by the Saints were made in a certain point in history and don't mean exactly what they seem to say if applied to an entirely different Christian landscape.
And there are those whose position is more to guard the Church, who may speak more strongly. These aren't the voices inquirers need to hear though, unless they plan to come in and remake the Church, which I think is almost never the case. Those voices are intended for other ears.
All I know is that it is easy to create a wrong impression, and there's a lot of it as a result.