Desmond Tutu is well known for having an abusive Father: http://spiritualityhealth.com/articles/why-we-forgive
As he sees the Bible as subversive and power-changing I am intrigued to read the rest of the Lent book! Clearly, he didn't grow up to be a violent man, and maybe he feels he carries his own father's image as well as the heavenly father's.
As an archbishop he evidently has been vested with institutional power to try and change things. It's encouraging he feels he can use his influence for the good of humanity, and not be partisan. I'm not sure this is as easy if you are on the fringe of an organisation, although perhaps I'm underestimating my personal "powers" of kindness, goodness, forgiveness etc. and the fruits of the Spirit.
I think I'd have to have a secure boundary in knowing I was unquestionably made in the image of God before seeing God in ALL others, as in love your neighbor as yourself. Having said that, I try and pray for my enemies.
With churches it can be that certain people are seen to carry the image of God more than others. The church I'm going to at the moment is warm, friendly and welcoming. I'm receiving a lot of healing from being able to deal with my past in community. For example, I bump into people I used to know and they help me navigate those choppy waters and some of stigmas around my mental health. It's not easy.