Most such incidents I've been witness to, have an initial trigger. It's hard to imagine that she simply got on the tram and started to spout all that nonsense.
This is a very valid point. The video did not express what caused her to rant on like that. Could have been drugs, booze, a really
shitty day, losing her job to a foreign worker, maybe someone fell on her, or smacked her child on the head with their bag (this happens to me ALL the time on the train) god knows. This is something one should always bear in mind. People can explode unexpectedly and we have no clue why. All we can do is apply a rule of thumb to the behaviour that allows us to carry on with our existing model of how the world works
which is a prominent subcomponent of the super-ordinate category shit I have decided that is true based on the stuff I have seen and thought about
No matter what the cause though, her verbal expression of release was offensive and grounds for arrest for civil disturbance.