ἀλήθεια, I'll try to answer your two recent questions, though I am of course not an expert in these areas (just 16 years of Catholic school and reading books and looking up things on the Web, but that still doesn't make me an expert).
As far as I know Purgatory is a process of preparation and that whatever unpleasantness there may be is erased by what lies just beyond. If you have ever seen the movie "What Dreams May Come" I think there is a scene that suggests that kind of transition.
Furthermore, based on all my research cited above, Catholics and non-Catholic Christians (at least) will be going to Heaven, and therefore (logically) I expect a mixture of both in Purgatory.
As for Gandhi, yes, I knew of that quote, which is why I knew the exclusion "through no fault of their own" in section 848 did not seem to apply to him. And so I wished for some other "loop hole".
And as for your question as to why the behavior of other Christians could possibly be used as an excuse to not become a Christian, I think there are a number of things that could be said. Someone who has become a Christian should not stop being one because of the behavior of other Christians, but we cannot expect the same adherence to that rule from someone who did not even join the faith. C. S. Lewis in his book "Mere Christianity" speaks of a whole definitional question for the word "Christian", but I don't want to go off on a tangent. There is also in theology the division between God's ultimate will and his permissive will. Jesus said he was the way and all should follow him. But he also said that the brother who griped and moaned but still did the will of the Father was better than the one who said he would but never did. I see Gandhi as doing the Father's will regardless of what he chose to call it.