Unfortunately they are similar to other clubs that want instant results from a new manager, and when they don't get it, they sack them which disrupts the team and staff.
When they took on Pardrew with a 5 year contract, I think everybody thought no way will he last, and he didn't.
Not because he isn't a good manager, its because managers don't last that long at Newcastle, 11 in the past 10 years, and the money they have paid out over the years in compensation must be millions.