Not racist in any way.
Sunshine??? That one I simply don't get, and what's really annoying is that a story like this detracts from real issues surrounding racial problems in London.
However, if I were McGrath, and that question were posed to me, I would simply reply,
"Of course we would encourage those who have come to the UK to make homes and raise families to stay...the Conservatives are not a party of division. However, we recognise that older Caribbean immigrants tend to return to their birth countries when they retire. We just hope that they don't feel anything but welcome here".
Easy peasy. If I can come up with an (admittedly over-long) soundbite like that, it's surprising that he couldn't.