My ability to forgive is directly related to my perception of intent. If I believe that an action can have good intent, but poor execution, then I can appreciate those good intentions.
Given that we are finite beings facing the infinite. Forgiveness is the tool to overcome our own inherent ignorance of the totality.
Christ's words on the cross, "Forgive them Father, for they know not what they do", is the succinct expression of that fact of existence. We don't have the capacity to completely understand our own existence. We are simply groping blindly through the dark, along a narrow tunnel of limited perception, that closes up behind us as we go. Can we really be held accountable for that state of ignorance?
My personal choice to allow people the space to be ignorant. I would hope they could afford the same charity towards me.