No Mrrzy, it is not guns and it is not people. It is placing guns in the hands of the wrong people. It really is quite simple - make guns extemely difficult to get hold of and you will drastically reduce the number of these incidents. In my memory we have had 2 mass shootings in the UK. Hungerford in 1987 and Dublane in 1996. Nothing like that since as private guns have effectively been banned. Of course criminals will still get hold of them. Of course people can kill without guns. But there is nothing like the scale of what happens there anywhere else.