To those of you who say the British left their ex-colonies in a 'better state' than when they arrived, could you provide facts rather than rhetoric, please?
Perhaps you should try speaking to people who actually come from those countries and ask their opinions. For example, the excessive political (and now national) corruption in Nigeria was actually put in place by the British - they carefully constructed a system which allowed transfer of power to the Nigerians by making sure that the Brits' chosen puppet figure got into power plus a whole host of other measures to ensure that thiings worked exactly as they wanted them to, rather than creating a truly democratic system where Nigerians could benefit themselves. Nigeria has been in a huge mess for decades - yes, a mess which they should have sorted out themselves, but nonetheless a mess that was started by the British (not to mention the billions of oil pounds leaking out of the country to British companies over the decades, etc etc). This is just one British ex-colony - is this what you're referring to as 'a better state'?
In any case my statements about the effect of white Brits abroad was not a tirade against colonialism; that's all in the past. My point is that if you want to talk about how immigration relates to the UK, your discussion is incomplete (and therefore inadequate) if you only refer to people migrating into the UK. And, scaryteacher - yes, Vikings and Normans did that too, of course! As did the Romans, etc etc.
The fact is that immigration has always been a key feature of this country's growth and development for thousands of years. Without it there wouldn't be a living soul walking these lands. So immigration per se is, of course, not a problem; nor is immigration of brown skinned folks to white countries or vice-versa. The issue of importance in all forms of immigration, is, of course, how it's managed.
As far as the language issue is concerned, I also think it's essential that people learn to speak the language of their host country. I've taught hundreds of foreigners to speak our language and have never met anyone who couldn't learn to speak it effectively, so I'm pretty inflexible on that point. However I don't have any problem with people maintaining their own culture, customs, language, religion, etc alongside integrating into life into their host country. I think people who do have an issue with this are doing it mainly out of ignorance (as dp demonstrated above by saying she didn't mix with gays or Muslims), which breeds suspicion and fear. People should rely less on what their imaginations tell them about other nations and more on direct experience - like the Neo Nazi prisoner who ended up on a wing with all black inmates. He ended up making great friends with them and developed a great sense of respect for them. Dp - would you be brave enough to challenge yourself to hang out with Muslims and gays for a month? Perhaps you could set up a blog on MN - there are loads of us who'd love to find out what you discover about yourself and about them.