I´m spanish and I support the right of carriage guns on board the airplanes.
I been in the army, and I have been trainning to use arms, and we have some cool people over here that knows very well how to use it on board planes, with no risk to the aircraft or the passengers, and a lot of risk for the lives of the bad boys.
With the proper training a gun on an aircraft is an extra measure of safety, and with the new plastic frangible munitions that the US airmarshalls and the El Al security personel usually carry, there is not risk at all of damaging the aircraft.
The only problem of guns is the fear of unkwnowledge, but this is overcome easily if you get used to them, and know the procedures that the security personel is going to apply in each case or critical situation.
You need to have active security on board, because sooner or later all pasive security means will be bypassed or fouled, and some of us are going to live disgusting experiences.
Personaly I want to have another barrier or better said, another "tool" to solve potential crisis inside my plane.
The problem of my country is that we are still cultural rednecks and we are full of cowards, and we dont know in which world are we living. Probe of that is our new elected goverment. They have tried to end the ETA terrorist threat making a deal with them, and the result is more killings, but this didnt matter for more than 10 million of spainyards that have voted for the socialist party again.
I can say proudly that I´m not one of them, and I feel shame of my country and my goverment.