I apologise if I've given Mr de Menezes' job wrongly, chompu - I do like to get things right, whether significant facts or not.
But if you think the police weren't out to shoot someone, you have to ask why they had guns. If you think they only needed to protect themselves in an emergency, you have to ask what sort of emergency actually arose - bearing in mind that Mr de Menezes did not have a bomb, or jump turnstiles, or run away. He walked into the station, paying with his Oyster card, and got onto a train and sat down. Hardly suspicious or improper behaviour. The bad behaviour was all on the part of the police. At no stage did they have any need to shoot anyone whatever. Yet they did. That's why I think they wanted to shoot someone - because they did shoot someone, and someone entirely innocent.