Can we separate justice from theology in Christianity? And if we do, is this right?

Dr. Martin Luther King in one of his major speeches said: >I want to say to you tonight, that I intend to keep these issues mixed because they are mixed. Somewhere, we must see that justice is indivisible, injustice anywhere is a threat to justice everywhere and I have not fought long and hard against segregated public accommodations to end up at this point of my life, segregating my moral concerns. It seems likely that he was urged to keep justice and so politics separated from his religious commitments. Given the answer that this question has received, it's likely that I haven't been focuses enough in what I'm asking. So I'm adding the following to make it clear what I'm asking: **Q. Was Dr. Martin Luther King urged by the clergy he knew and was mentored by to keep his sermons and speeches clear of controversial political subjects, such as Imperialism, Economic Exploitatuon and Racism?** And **Q. In the wider Christian community, but in particular for pastors within the Catholic and Baptist dispensations are pastors are expected to keep questions of justice, and hence politics, separate from that of theology and then to focus wholly on the latter? And if so - is this right?** It should go without saying, that I am no pastor; in fact, I'm not a Christian. My interest in Christianity simply arises from being born in what was once a major Christian country and that Christ is a major figure in Islamic Prophetology and a wider interest in religion in general. An anecdotal evidence, I note that in the only church service that I have attended and which was at Christ's Mass, the Anglican vicar spoke about the climate of disinformation and the turmoil caused by Brexit. This seems political - to me.