some critics believe the name bigger is a cobination of the words big and nigger what evidence is there that wright may not like or approve of bigger's behavior in book one

I don't think that the author makes excuses or justifies Bigger's murder of Mary. I'm not sure about the combination of words you mention but it may be that, if accurate, the author was trying to be ironic.

what evidence is there that wright may not like or approve of biggers behavior in book one