What elements of Indian life does Neolin criticize most strongly?

Larus has the right answer.

Neolin desired Indians to reject European life like clothes and alcohol. He required Indians to go back to how they were prior of their meeting with Europeans and resume their individuality as Indians.

He desired the Indians to get rid of all the trespassers from their land. He said that Indians should regard themselves as entities and not as a part of a tribe.