Good post mate, and also good you mentioned your own bunch of 'supporters'.
Almost all clubs have a core of what I'd call disturbed individuals, who, when part of a group, forget all the rules of civilised society and revert to type, in this case their most primal need to cause harm and injury to anyone who happens to stand in their way. There's a tribal allegiance to a club that is impossible to justify, yet somehow these morons consider it acceptable to think that the fact that they live within a certain catchment area allows them the opportunity to behave like thugs as they 'represent' the club they feel affiliated to.
What I do find unnerving is that this affiliation often boils over into a hatred of certain rivals. We have a rivalry, intense at times, with Wednesday, and at times the hostility is something I make sure I'm removed from. I enjoy the banter between us and other clubs, but do I hate any club's supporters? No, it's a waste of energy as well as the fact that it's based on a set of motives that are quite simply, stupid. I love my club, but would I spill blood for it? Fortunately the Blades I know also possess the same values as myself, hopefully the same applies with your good self mate.