So, by your own admission, there was no consensus for removal. Editors who attempt to classify material must base their organization on sources, which you did not do when writing: "What is the rationale behind claiming that these 500 years was a single event, and conquerors comprising a wide geographic region from Turkey, Persia, Mongolia, Afghanistan, et cetera need to be bundled up into one wide ranging entry under "Muslim conquest of the Indian subcontinent". The existence of Crusades and European colonialism is on different grounds."