For every CDW there are ten thousand people who don't think anything like her.
Sadly it's the creakiest gate that gets the oil of publicity - like the eedjits we see crying out to turn the UK into a muslim state (there are about three of them in the UK but they are very loud). They are who the likes of the DM hold up as 'representative' - sheesh!
I think things have got nastier because of the wars in the ME and recession/pissed-offness of people in general.
Regarding integration, its a toughy - if I lived abroad, I would do so because I really wanted to go, luckily not because I was persecuted, disposessed or had to build a new life. I would want to learn the language, eat the food (well, maybe not if I lived in Japan, as real Japanese food is... challenging) but I'd look pretty stupid turning up to a formal event in a kimono (tall with red hair, hmmmm). If I did things in my own way I'd not be rejecting my new home but I couldn't possibly agree with everything they do (think Spain and bullfighting - don't think they do this anymore - and the bull runs which are pretty cruel). That wouldn't make me against everything though. Taking nationality is another question mark - not so tough if you were an EU citizen with a UK passport, but if you lived in the US, its another matter I suppose.
I have met some people born in the UK who spoke very little English (Bangladeshi women in East London). I think thats a bit sad - how can you vote, work, speak to the milkman or postman, go to the doctor or hospital by yourself/with your kids, take your kids to school or to the cinema to watch the latest films if you can't communicate fully? Theres a scheme near us for women to learn English set up by a woman in her 50s who came to the UK as a teenage bride but only learned English when she realised that her teenage daughters were drifting away from her due to lack of communication. I am crap at learning languages, so in no way judge anyone who does not learn (am in awe of anyone bilingual anyway, ie most of my family - I'm the thicko!)
In the UK we don't make people integrate (not sure what that would look like?). Maybe that's because we have a long history of refugees coming to our shores - now that's something we should be bloody proud of.