Yes. My point was simply going to be that you're seeing tensions in both ways and trends in both ways: that the bilingualism is working, even in those communities, as both a force of separation and a force of unification. I think what researchers are finding is that it depends on how the communities themselves decide how they want to take advantage of the plurality of language in their city.
So it seems to me that most researchers would argue that if a community decides it is an advantage to be linguistically diverse, this is something they can take to their advantage. Toronto is an example of a city that has taken diversity--