They are not even Dalits, but Tribals! Tribals are not even in the caste system.Maoist are the voice of oppressed hindu dalits ruled by minority brahmins.Every minority and oppressed people must support Maoist for justice from terror perpetrated by hindu groups in india.
This didnt start out as a caste system problem, but large companies trying to take tribal land for things like mining(ever seen AVATAR).. This has evolved into like a Maoist revolution like in China, but much much much more smaller.
They are not liked as much as you think..