Liverpool fans and management know how much Klopp has done for Liverpool. He won them their first premier league title after 20+ years and won them the champions league aswell. So it would be really bad to sack him for starting the season bad.
Firing Klopp at this time is not a wise option for Liverpool because Klopp can still fix all the adversity at the beginning of this season for the better by changing their strategy and way of playing in a better direction. Because I was also a little surprised when Liverpool were beaten by Napoli with an unusual score for Liverpool. Even I had predicted that English clubs would always be stronger than Italian clubs, but in reality this is not the case.