Some of my closest friends in this country include a Greek, a South African, a Lebanese guy, a Northern fella and there used to be a guy from Macau who left. I lived in areas that are typically poorer and with more immigration. My experience with immigration (from wherever) is that 90% of humans, white, East Asian, South Asian, Black, etc, are the same. All kind to varying degrees depending on who they are individually, helpful to varying degrees depending on who they are individually, but law abiding and good.

Then there were people who came from poor countries, often with terrible childhoods, who did commit crime or behaved in a way the tabloids love to talk about. They are less than 1-2% of the people I have ever met personally.

So overall, yes. Immigration is bringing a lot of good people over and I for one am glad to meet and learn from them. That said, there are obvious problems that we must be careful to solve first before continuing to expand immigration. Housing and labour are the top priorities.

Like it or not, the biological world started out as a hot mess of all sorts of organisms coexisting, and it will end this way. No country on Earth is going to quarantine itself from the rest of humanity for long. Britain has been all about going everywhere and saying "hi" to people from all around the world (the "hi" was often followed by other things like "where are the jewels"), so as a society we've embraced this spirit of immigration a long time.

Look at all the newest countries in this world, Australia, USA, New Zealand, Canada, all started with the mighty help of excessive British immigration.