L.H., it is usually Irishmen who tell Irish jokes, too. Some make a living at it, and are possibly very grateful to the politically sensitive who deter others from using their material!

As for the 'suicide by train' controversy, I can see his point. By the time the train has stopped, it is well past the body. If there is an immediate investigation, some thousands of people will not get to where they are going for hours, and arrangements and whole industries will be disrupted. And all this despite the fact that the driver and his passengers can bear no responsibility whatsoever for the incident! It isn't as if he was swerving all over the road, or if he could do an emergency stop, is it!
The driver could just get replaced at the next stop, then come back, (arriving at the same time as the senior policemen, probably) to say 'I didn't see anything /I couldn't do anything.'