How about this alternative that's always been true for me and well.. probably everyone: people spend more time with like-minded people, be they foreigners or not. Why? I don't really need to answer that, right? :) So what does that mean? Well it means that you integrate easily into like-minded communities. If you're a foreigner then it's very probable that you're the odd one out and the community is composed of mostly natives.
I have lots of Romanian friends with whom I spend most of my time with, but I'm convinced that it's mostly due to the fact that we're like-minded. If I overhear a Romanian on the street do I instantly feel a need to talk to him? No, but I don't instinctively distance myself from him either.
edit: typing
This distrust was actively cultivated during communist times - if you would speak your thoughts to the wrong person, you would be made to disappear in the middle of the night by the secret police. The kink is that you didn't know who the "wrong person" was - brothers would snitch on brothers, sons on fathers, co-workers on each other. So you couldn't trust anybody.
This slowly changes with the generation change - younger generations didn't live through this paranoid system, so they don't understand the fear and the reservations - but the change will take another 20 - 40 years IMHO.
And precisely this is the second focus of the campaign: raising awareness that there are a lot of emigrated high-achieving Romanians, quietly blending in.