Two matters stem from this. The first is simply that individuals are responsible for racist attitudes, not the organisation for which they work, although those organisations have a duty to call out racists in their midst.
The other is to recognise what we are, institutionally and systemically. The UK’s uncodified constitution has two Churches established in law, the Church of England and the Presbyterian Church of Scotland. The monarch is the supreme governor of the former, as well as head of state.
That is simply the way it is and, this side of disestablishment of the Church, it follows that (in England and Scotland at least) we live in a Christian country, however few of its inhabitants now attend its churches. In short, Christianity is baked into our systems and institutions.
Our politicians might be mindful of that, whatever their faith or none. And they might like to note some of the imperatives of its teaching: care for the afflicted in the story of the Good Samaritan; the welcome of strangers in the report of the Syrophoenician woman who seeks crumbs from the table; the love of neighbour; Paul’s universalism.
This (and much else besides) is meant, in law, to define who we are. We might expect an elected servant of the state such as Lee Anderson, the Tory suspended from his party for claiming a Muslim power grab of London, or Azhar Ali, the Labour candidate similarly booted out for claiming that Israel conspires to murder its own citizens, to know something of the national creed that defines our parliamentary democracy.
That parliament doesn’t contain institutionally racist parties, any more than the BBC or our police forces are systemically racist. Rather, we should hold individuals to account, whoever they are. Because, ultimately, claims of institutional racism let individuals off the hook. Institutional Christianity does not.