The jury is still out on Harry Redknapp. Some Spurs fans love him, and others are not so fond of him. He is often criticized for his cooperation with the media, having always been a favorite manager interviewee at Sky Sports.
A frequently made accusation asserts that Redknapp "runs teams into the ground." Evidence of this can only be found in the rubble of Portsmouth Football Club when, in 2010, two years after Redknapp left, Portsmouth were relegated and went into administration (through no fault of Redknapp's, it seems).
Be that as it may, critics will still be critics, and supporters will still go on supporting. I am not here to decide whether Tottenham should let him go or not, I am only here to address issues relating to why he would stay or not.