Well, I would agree and disagree with parts of your comment. I personally feel from reading this forum that the hated of Liverpool and its fans is directly linked with the increasing success of the club and its current role as the main challenger to you. In the past there rarely seemed to be antagonism between the 2 sets of supporters (again , I'm taking generalities here) at a time when city were in the rise and Liverpool were going in the opposite direction.
I also believe that it is the role of a manager to connect with the fans, and that Klopps behaviour is generally positive although not perfect.
At the same time, there is no denying that the behaviour of some Liverpool fans is deplorable and getting worse. I'm not sure I would use the term feral, but I can understand why you would. Whether this is of frustration at the years of failure, at the worry that things might go backwards, or more likely, that some people are just deeply unpleasant 'fans' who can't operate in a civil society, I couldn't say, but I wish it were not the case.
As as been said before, you can trace it directly back to the destruction of our bus. Why are you even 1% surprised that people here dont care for your club after that? Basically, you couldnt win the game fair and square on the pitch, so your fans took it into their own hands, aided and abetted by a compliant police. You also benefited in that game outrageously from ref decisions, over which your fans are still in denial.