There are no “mysteries” as Jesus revealed those mysteries. The gospel was hidden but was revealed by Jesus. Paul refers to “mystery” because it was hidden to many. This does not apply now. All is revealed by Christ
But Timothy states that all mankind will be saved and come to the knowledge of the truth. God is the saviour of all mankind. So..... ALL in ALL. Read the Bible again - context matters!
Is it wicked because they used the free will your 'god' gave them? Or because christens think that god makes them the owners of other men... Least when my people slaves we didnt blame our religion we said our gods decreed all men are gods and must use that power or they are not worth such power we never started wars in their names we faught to sit beside them in Valhalla.... Also nothing about this story makes sense if god made Adam an Eve only how did Cain procreate how did these civilizations start with NO PEOPLE cause the bibles all fictional stories and Christianity has commited great atrocities for a fictional character that doesn't exist