stop fire?

I think that is very good who ETA state stop fire permanent because if it's true the violence of ETA stops forever.
Some peolple think that is one strategy for make a big attack or something similar but I think that if ETA say that is the end of their violence it's true so they say that is the stop fire permanent. If it's a lie so why they tell it? for kill more? I think that's one silly thing because if they don't wan't to stop kill they don't say nothing and already...
For me it's a very good event.