For your question that why did Sunni scholars collected all sorts of reports in their books, then i think this article will be benefitial for you, because most of the weak and fabricated reports which are presented by Shias against Sunnis comes from History of Tabari: http://www.schiiten.com/backup/Ahlel...am/tabari.html In the above article you will get the answer for your query as to why they collected those.. secondly, you will find that even Shia scholars did the same, they collected all sorts of reports..and when you question them regarding some reports in their books they will say that such and such report is weak. And regarding death of Fatima(ra), please visit this article: http://youpuncturedtheark.wordpress....tack-ahlebayt/ here you will find detailed answers, for the shia allegations, not short cuts....