You are answering your own point's. If he starts to win it will melt away-if he continues to lose he will get dogs abuse. Nowt to do with alienating fans.
This is a club who's fans are desperate for some form of success-if he manages to produce something-anything, he will easily win fans over.
As an aside or example. Did you see City tonight? Booed off at HT, cheered off at FT. Fickle lot footie fans.