As
we know up to now King Dasis Ravana was not a thief/ratio as
Ramayanaya tells us.It means there is a conspiracy between those
stories.What we had to think is this battle conducted to overthrow the
King Ravana from his crown & distroy the great civilization.To
do this they attach sitha role in to this and change the real story
behind this so as far as we concern King Ravana was the real
Hero..............
