We wasted a lot of money, we look no closer to winning major trophies (league or Champions League) than on day 1, we play dreadful football most of the time... I really don't see why we need to wait until the wheels have well and truly fallen off. Why not actually try and save the season? We made the same mistake with Moyes, waiting until it was mathematically certain we would not qualify for the CL even though his ineptitude had become woefully obvious much earlier; we made the same mistake with Van Gaal, not firing him in December 2015 when our season completely derailed...
I know we are going to make the same mistake with Mourinho, that we are going to wait and see if he can do something he has never ever done in his career - turn around a crisis - but I do not have to be happy about it. Essentially, we're writing the season off.
EDIT: And I would be really, really, really interested to know WHY ON EARTH is any United fan a "Jose fan". The unwavering loyalty he commands from a section of our supporters is nothing short of bizarre. He achieved big success at one of our rivals; he did absolutely nothing special at United and repeatedly shat on the club (footballing heritage, remember?), he does not play entertaining football. I'm genuinely baffled how and why he managed to create such a cult of loyal followers.