Jenrick has basically presumed that none of the non-white people he has seen have not integrated into British culture.
He's cast a whole net over a group of people without really knowing anything about everyone of them. It's a massive generalisation and just downright unnecessary.
It's barely fine to even make the observation, but to verbalise it in the way he did clearly shows what he's thinking inside.
Why does he think none of them have integrated? They could have set up businesses there, is that not integrating?
It's like when Katie Hopkins (ugh) would go to random streets in the UK and crop photos to say 'we've lost Britain' just because there were a few Polish or Turkish or Indian shops next to each other. But widen the picture and you'd see a normal supermarket or shop there. It's gutter politics. No need for it and no need for the division. When they're all about wanting unity they go about a funny way of demonstrating it...