I said it like 13 months ago, ( I will look for the post and quote it here), when you start to get a divisive fan base just know the manager is doing a very very bad job.
Its one of the major symptom of a failed regime, tenure and it's usually a precipitate to a manager being sacked many of the times.
Now, as of today, Arsenal, Liverpool, City fans all believe in their managers completely, there is no big division. Why because their managers are doing something positive.
For us, division are getting bigger and bigger. Cracks between fans is widening in opinions, and that shows you how badly ETH has done.
We all love United but have different opinion regarding our manager. Big red flag.