Why though? It depends on the actions and what is said, he didn't appear aggressive... it is ridiculous to label someone aggressive by default simply because they happen to be big. Say he's polite and he's say a posh bloke and has gone through and said for example "excuse me but I think you were completely out of order there chap, I believe I'm owed an apology" - how is that aggressive? Just because he's big.
He might have been aggressive, we don't know for sure but his body language didn't seem to be an unless we know what he said then you can't conclude that he is. Otherwise what is your reasoning for it?
Again - just to be clear, back in the real world I'm not advocating that it is a good idea to follow the "roadman" person in the first place, I'm taking issue with the idea that it is an inherently aggressive act, that is still to be explained by either yourself or the other poster who have claimed it is.
i've already explained my position and reasoning in the post you quoted.
if you follow somoene you've just argued with to another area with the sole intention of confronting them then that is an agressive act - at least in my opinion.
I'll beef it out a bit as i probably wasn't very clear - and just to be doubly clear, the following is just my own opinion.....
if i have just had a stand up argument with some dude and i walk off and he then follows me to the next train car a few moments later - posh accent or no, which is largely irrelevant as i'll almost certainly see them before i hear them as i'll be keeping my eyes peeled for them following me, then i am going to read that as them being aggressive and i will prepare myself for what may be coming next and his physically size 100% plays a part in that. a big, apparently capable chap following you down a train is more likely to appear aggressive than a one legged smurf. you can take issue with it me claiming it's an inherently aggressive act all you want, that doesn't change my opinion. the victims intentions may have been entirely honourable (though i kind of doubt that) but the act of following someone you don't know after a heated exchange is immediately an aggressive act (imo) - unless you somehow pre-emptively make a huge and obvious attempt to appear non agressive (no idea how you'd do that other then holding up a sign or having the train conductor anounce it (i jest btw). almost always the person being followed is going to treat that action as aggression. even more so when they are off their head. and even more so when the other person is considerably bigger than them. unfortunatley for the victim he learned the hard way that trying to wrong a right or prolong a needless altercation rarely leads to a happy ending.
the defendant will almost certainly have seen the victim coming towards him, long before he heard anything he had to say and therein lies the problem for the genuine person looking for a bit of closure or an apology - the stage, as it were, is set(in the mind of the defendant) before they get to open their mouth and usually by that stage there's not a huge amount they can say that will deviate it from that path, especially when dealing with 'roadman' types (i like that term btw - i'll be using it more even though i had to goolge it!). if someone sees a stranger they have just argued with (and that dude is considerably bigger than them) follow them they are almost always going to immediately deem that as aggression. more fool them if they don't.
but we are all moulded by our own life experiences and those are almost always going to be different so while i hope you understand what i'm saying it may well just be a case that we view this situation differently due to these differing life experiences.
finally, just for clarity for anyone trying to misinterpret the above (not you dowie - but some others seem to be shouting about victim blaming, i'm 100% not victim blaming)
i am not for one second trying to justify the defendants actions - he has no place in society but the world can be a crappy place inhabited by crappy people so while the victim did not in anyway deserve to be stabbed to death you simply cannot go round following someone you do not know after an argument to give them a piece of your mind much as we would all like to. well you can, but if you aren't prepared for what may happen then for god/buddha/**** sake don't do it. perhaps a sad lesson for those who may view the world as a nicer place than I.