How does Jeckyll's inability to accept his id's desires and transgressions lead to a dangerous relationship that evolves between himself and Hyde?

Any person has to face a difficult side to his/her personality. When Jekyll cannot accept who Hyde is, they completely seem to be unable to relate. Is this a destructive relationship? Of course it is. One must accept every part of one's personality; going in any other direction fragments the personality as is evidenced by the shift between Jekyll and Hyde.