As sad as this incident was i am struck by the fact that that it occurred at the same time as a Polish Food and Craft festival.
We surely all know about the rise in the incidence of violence at moments of celebration:weddings, Christmas etc.
Although, Marek you point to this high-time for your Polish community it is rather played down on the list below. I wonder if you feel this time is a big deal for Poles in Jersey?
http://www.thisisjersey.co.uk/section/annualevents.html