I rarely agree completely with anyone, and I doubt anyone ever completely agrees with me. Moreover, the longer we go on talking, the more likely we are to find points of disagreement with one another.
When IC and I comment here on what others have written, we usually try to quote just enough to allow the writer to fully and clearly make his point in his own words. The goal is to find the sweet spot between unfairly representing an argument and letting it overwhelm our commentary on it; after all, they have their platforms and we have ours.