Why do you think we care so much?
Now, in my head apparently this sounded much different than it did to the hearers. The question was to ascertain the reason for which we cared so much. And the answer was because we cared about the person to whom we were speaking. But I had no I clue that this would actually be heard as:
What delusional idea convinced you that we actually care about what you're telling us?
That is quite a different question. Those clauses are dangerous when they are ambiguous! Clear communication is so important!