In The Lost Message of Jesus I claim that penal substitution is tantamount to 'child abuse - a vengeful Father punishing his Son for an offence he has not even committed.' Though the sheer bluntness of this imagery (not original to me of course) might shock some, in truth, it is only a stark 'unmasking' of the violent, pre-Christian thinking behind such a theology.
I believe that when we treat homosexual people as pariahs and push them outside our communities and churches; when we blame them for who they are; when we deny them our blessing on their commitment to lifelong, faithful relationships, we make them doubt whether they are children of God, made in his image.
If the cross is a personal act of violence perpetrated by God towards humankind but borne by his Son, then it makes a mockery of Jesus' own teaching to love your enemies and to refuse to repay evil with evil.
As in art, poetry, music, etc., the best theology is worked out in pain
In autumn 2012 I conducted a dedication and blessing service following the Civil Partnership of two wonderful gay Christians. Why? Not to challenge the traditional understanding of marriage - far from it - but to extend to these people what I would do to others: the love and support of our local church.